結果
問題 | No.1364 [Renaming] Road to Cherry from Zelkova |
ユーザー |
![]() |
提出日時 | 2021-01-30 20:57:06 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 449 ms / 2,500 ms |
コード長 | 29,214 bytes |
コンパイル時間 | 3,505 ms |
コンパイル使用メモリ | 218,788 KB |
最終ジャッジ日時 | 2025-01-18 10:01:36 |
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
(要ログイン)
ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 45 |
ソースコード
#line 2 "/home/yuruhiya/programming/library/template/template.cpp"#include <bits/stdc++.h>#line 6 "/home/yuruhiya/programming/library/template/constants.cpp"#define rep(i, n) for (int i = 0; i < (n); ++i)#define FOR(i, m, n) for (int i = (m); i < (n); ++i)#define rrep(i, n) for (int i = (n)-1; i >= 0; --i)#define rfor(i, m, n) for (int i = (m); i >= (n); --i)#define unless(c) if (!(c))#define all(x) (x).begin(), (x).end()#define rall(x) (x).rbegin(), (x).rend()#define range_it(a, l, r) (a).begin() + (l), (a).begin() + (r)using namespace std;using ll = long long;using LD = long double;using VB = vector<bool>;using VVB = vector<VB>;using VI = vector<int>;using VVI = vector<VI>;using VL = vector<ll>;using VVL = vector<VL>;using VS = vector<string>;using VD = vector<LD>;using PII = pair<int, int>;using VP = vector<PII>;using PLL = pair<ll, ll>;using VPL = vector<PLL>;template <class T> using PQ = priority_queue<T>;template <class T> using PQS = priority_queue<T, vector<T>, greater<T>>;constexpr int inf = 1000000000;constexpr long long inf_ll = 1000000000000000000ll, MOD = 1000000007;constexpr long double PI = 3.14159265358979323846, EPS = 1e-12;#line 7 "/home/yuruhiya/programming/library/template/Input.cpp"using namespace std;#ifdef _WIN32#define getchar_unlocked _getchar_nolock#define putchar_unlocked _putchar_nolock#define fwrite_unlocked fwrite#define fflush_unlocked fflush#endifclass Scanner {static int gc() {return getchar_unlocked();}static char next_char() {char c;read(c);return c;}template <class T> static void read(T& v) {cin >> v;}static void read(char& v) {while (isspace(v = gc()));}static void read(bool& v) {v = next_char() != '0';}static void read(string& v) {v.clear();for (char c = next_char(); !isspace(c); c = gc()) v += c;}static void read(int& v) {v = 0;bool neg = false;char c = next_char();if (c == '-') {neg = true;c = gc();}for (; isdigit(c); c = gc()) v = v * 10 + (c - '0');if (neg) v = -v;}static void read(long long& v) {v = 0;bool neg = false;char c = next_char();if (c == '-') {neg = true;c = gc();}for (; isdigit(c); c = gc()) v = v * 10 + (c - '0');if (neg) v = -v;}static void read(double& v) {v = 0;double dp = 1;bool neg = false, after_dp = false;char c = next_char();if (c == '-') {neg = true;c = gc();}for (; isdigit(c) || c == '.'; c = gc()) {if (c == '.') {after_dp = true;} else if (after_dp) {v += (c - '0') * (dp *= 0.1);} else {v = v * 10 + (c - '0');}}if (neg) v = -v;}static void read(long double& v) {v = 0;long double dp = 1;bool neg = false, after_dp = false;char c = next_char();if (c == '-') {neg = true;c = gc();}for (; isdigit(c) || c == '.'; c = gc()) {if (c == '.') {after_dp = true;} else if (after_dp) {v += (c - '0') * (dp *= 0.1);} else {v = v * 10 + (c - '0');}}if (neg) v = -v;}template <class T, class U> static void read(pair<T, U>& v) {read(v.first);read(v.second);}template <class T> static void read(vector<T>& v) {for (auto& e : v) read(e);}template <size_t N = 0, class T> static void read_tuple_impl(T& v) {if constexpr (N < tuple_size_v<T>) {read(get<N>(v));read_tuple_impl<N + 1>(v);}}template <class... T> static void read(tuple<T...>& v) {read_tuple_impl(v);}struct ReadVectorHelper {size_t n;ReadVectorHelper(size_t _n) : n(_n) {}template <class T> operator vector<T>() {vector<T> v(n);read(v);return v;}};struct Read2DVectorHelper {size_t n, m;Read2DVectorHelper(const pair<size_t, size_t>& nm) : n(nm.first), m(nm.second) {}template <class T> operator vector<vector<T>>() {vector<vector<T>> v(n, vector<T>(m));read(v);return v;}};public:string read_line() const {string v;for (char c = gc(); c != '\n' && c != '\0'; c = gc()) v += c;return v;}template <class T> T read() const {T v;read(v);return v;}template <class T> vector<T> read_vector(size_t n) const {vector<T> a(n);read(a);return a;}template <class T> operator T() const {return read<T>();}int operator--(int) const {return read<int>() - 1;}ReadVectorHelper operator[](size_t n) const {return ReadVectorHelper(n);}Read2DVectorHelper operator[](const pair<size_t, size_t>& nm) const {return Read2DVectorHelper(nm);}void operator()() const {}template <class H, class... T> void operator()(H&& h, T&&... t) const {read(h);operator()(forward<T>(t)...);}private:template <template <class...> class, class...> struct Multiple;template <template <class...> class V, class Head, class... Tail>struct Multiple<V, Head, Tail...> {template <class... Args> using vec = V<vector<Head>, Args...>;using type = typename Multiple<vec, Tail...>::type;};template <template <class...> class V> struct Multiple<V> { using type = V<>; };template <class... T> using multiple_t = typename Multiple<tuple, T...>::type;template <size_t N = 0, class T> void multiple_impl(T& t) const {if constexpr (N < tuple_size_v<T>) {auto& vec = get<N>(t);using V = typename remove_reference_t<decltype(vec)>::value_type;vec.push_back(read<V>());multiple_impl<N + 1>(t);}}public:template <class... T> auto multiple(size_t h) const {multiple_t<T...> result;while (h--) multiple_impl(result);return result;}} in;#define inputs(T, ...) \T __VA_ARGS__; \in(__VA_ARGS__)#define ini(...) inputs(int, __VA_ARGS__)#define inl(...) inputs(long long, __VA_ARGS__)#define ins(...) inputs(string, __VA_ARGS__)#line 7 "/home/yuruhiya/programming/library/template/Output.cpp"#include <charconv>#line 10 "/home/yuruhiya/programming/library/template/Output.cpp"using namespace std;struct BoolStr {const char *t, *f;BoolStr(const char* _t, const char* _f) : t(_t), f(_f) {}} Yes("Yes", "No"), yes("yes", "no"), YES("YES", "NO"), Int("1", "0");struct DivStr {const char *d, *l;DivStr(const char* _d, const char* _l) : d(_d), l(_l) {}} spc(" ", "\n"), no_spc("", "\n"), end_line("\n", "\n"), comma(",", "\n"), no_endl(" ", "");class Printer {BoolStr B{Yes};DivStr D{spc};public:void print(int v) const {char buf[12]{};if (auto [ptr, e] = to_chars(begin(buf), end(buf), v); e == errc{}) {fwrite(buf, sizeof(char), ptr - buf, stdout);} else {assert(false);}}void print(long long v) const {char buf[21]{};if (auto [ptr, e] = to_chars(begin(buf), end(buf), v); e == errc{}) {fwrite(buf, sizeof(char), ptr - buf, stdout);} else {assert(false);}}void print(bool v) const {print(v ? B.t : B.f);}void print(vector<bool>::reference v) const {print(v ? B.t : B.f);}void print(char v) const {putchar_unlocked(v);}void print(const char* v) const {fwrite_unlocked(v, 1, strlen(v), stdout);}void print(double v) const {printf("%.20f", v);}void print(long double v) const {printf("%.20Lf", v);}template <class T> void print(const T& v) const {cout << v;}template <class T, class U> void print(const pair<T, U>& v) const {print(v.first);print(D.d);print(v.second);}template <class InputIterater>void print_range(const InputIterater& begin, const InputIterater& end) const {for (InputIterater i = begin; i != end; ++i) {if (i != begin) print(D.d);print(*i);}}template <class T> void print(const vector<T>& v) const {print_range(v.begin(), v.end());}template <class T, size_t N> void print(const array<T, N>& v) const {print_range(v.begin(), v.end());}template <class T> void print(const vector<vector<T>>& v) const {for (size_t i = 0; i < v.size(); ++i) {if (i) print(D.l);print(v[i]);}}Printer() = default;Printer(const BoolStr& _boolstr, const DivStr& _divstr) : B(_boolstr), D(_divstr) {}Printer& operator()() {print(D.l);return *this;}template <class Head> Printer& operator()(Head&& h) {print(h);print(D.l);return *this;}template <class Head, class... Tail> Printer& operator()(Head&& h, Tail&&... t) {print(h);print(D.d);return operator()(forward<Tail>(t)...);}template <class... Args> Printer& flag(bool f, Args&&... args) {if (f) {return operator()(forward<Args>(args)...);} else {return *this;}}template <class InputIterator>Printer& range(const InputIterator& begin, const InputIterator& end) {print_range(begin, end);print(D.l);return *this;}template <class T> Printer& range(const T& a) {range(a.begin(), a.end());return *this;}template <class... T> void exit(T&&... t) {operator()(forward<T>(t)...);std::exit(EXIT_SUCCESS);}Printer& flush() {fflush_unlocked(stdout);return *this;}Printer& set(const BoolStr& b) {B = b;return *this;}Printer& set(const DivStr& d) {D = d;return *this;}Printer& set(const char* t, const char* f) {B = BoolStr(t, f);return *this;}} out;#line 3 "/home/yuruhiya/programming/library/template/Step.cpp"using namespace std;template <class T> struct Step {using value_type = T;class iterator {value_type a, b, c;public:constexpr iterator() : a(value_type()), b(value_type()), c(value_type()) {}constexpr iterator(value_type _b, value_type _c, value_type _s): a(_b), b(_c), c(_s) {}constexpr iterator& operator++() {--b;a += c;return *this;}constexpr iterator operator++(int) {iterator tmp = *this;--b;a += c;return tmp;}constexpr const value_type& operator*() const {return a;}constexpr const value_type* operator->() const {return &a;}constexpr bool operator==(const iterator& i) const {return b == i.b;}constexpr bool operator!=(const iterator& i) const {return !(b == i.b);}constexpr value_type start() const {return a;}constexpr value_type size() const {return b;}constexpr value_type step() const {return c;}};constexpr Step(value_type b, value_type c, value_type s) : be(b, c, s) {}constexpr iterator begin() const {return be;}constexpr iterator end() const {return en;}constexpr value_type start() const {return be.start();}constexpr value_type size() const {return be.size();}constexpr value_type step() const {return be.step();}constexpr value_type sum() const {return start() * size() + step() * (size() * (size() - 1) / 2);}operator vector<value_type>() const {return to_a();}auto to_a() const {vector<value_type> result;result.reserve(size());for (auto i : *this) {result.push_back(i);}return result;}private:iterator be, en;};template <class T> constexpr auto step(T a) {return Step<T>(0, a, 1);}template <class T> constexpr auto step(T a, T b) {return Step<T>(a, b - a, 1);}template <class T> constexpr auto step(T a, T b, T c) {return Step<T>(a, a < b ? (b - a - 1) / c + 1 : 0, c);}#line 8 "/home/yuruhiya/programming/library/template/Ruby.cpp"using namespace std;template <class F> struct Callable {F func;Callable(const F& f) : func(f) {}};template <class T, class F> auto operator|(const T& v, const Callable<F>& c) {return c.func(v);}struct Sort_impl {template <class F> auto operator()(F&& f) {return Callable([&](auto v) {sort(begin(v), end(v), f);return v;});}template <class T> friend auto operator|(T v, [[maybe_unused]] const Sort_impl& c) {sort(begin(v), end(v));return v;}} Sort;struct SortBy_impl {template <class F> auto operator()(F&& f) {return Callable([&](auto v) {sort(begin(v), end(v), [&](const auto& i, const auto& j) { return f(i) < f(j); });return v;});}} SortBy;struct RSort_impl {template <class F> auto operator()(F&& f) {return Callable([&](auto v) {sort(rbegin(v), rend(v), f);return v;});}template <class T> friend auto operator|(T v, [[maybe_unused]] const RSort_impl& c) {sort(rbegin(v), rend(v));return v;}} RSort;struct RSortBy_impl {template <class F> auto operator()(F&& f) {return Callable([&](auto v) {sort(begin(v), end(v), [&](const auto& i, const auto& j) { return f(i) > f(j); });return v;});}} RSortBy;struct Reverse_impl {template <class T> friend auto operator|(T v, const Reverse_impl& c) {reverse(begin(v), end(v));return v;}} Reverse;struct Unique_impl {template <class T> friend auto operator|(T v, const Unique_impl& c) {v.erase(unique(begin(v), end(v), end(v)));return v;}} Unique;struct Uniq_impl {template <class T> friend auto operator|(T v, const Uniq_impl& c) {sort(begin(v), end(v));v.erase(unique(begin(v), end(v)), end(v));return v;}} Uniq;struct Rotate_impl {auto operator()(int&& left) {return Callable([&](auto v) {int s = static_cast<int>(size(v));assert(-s <= left && left <= s);if (0 <= left) {rotate(begin(v), begin(v) + left, end(v));} else {rotate(begin(v), end(v) + left, end(v));}return v;});}} Rotate;struct Max_impl {template <class F> auto operator()(F&& f) {return Callable([&](auto v) { return *max_element(begin(v), end(v), f); });}template <class T> friend auto operator|(T v, const Max_impl& c) {return *max_element(begin(v), end(v));}} Max;struct Min_impl {template <class F> auto operator()(F&& f) {return Callable([&](auto v) { return *min_element(begin(v), end(v), f); });}template <class T> friend auto operator|(T v, const Min_impl& c) {return *min_element(begin(v), end(v));}} Min;struct MaxPos_impl {template <class T> friend auto operator|(T v, const MaxPos_impl& c) {return max_element(begin(v), end(v)) - begin(v);}} MaxPos;struct MinPos_impl {template <class T> friend auto operator|(T v, const MinPos_impl& c) {return min_element(begin(v), end(v)) - begin(v);}} MinPos;struct MaxBy_impl {template <class F> auto operator()(F&& f) {return Callable([&](auto v) {auto max_it = begin(v);auto max_val = f(*max_it);for (auto it = next(begin(v)); it != end(v); ++it) {if (auto val = f(*it); max_val < val) {max_it = it;max_val = val;}}return *max_it;});}} MaxBy;struct MinBy_impl {template <class F> auto operator()(F&& f) {return Callable([&](auto v) {auto min_it = begin(v);auto min_val = f(*min_it);for (auto it = next(begin(v)); it != end(v); ++it) {if (auto val = f(*it); min_val > val) {min_it = it;min_val = val;}}return *min_it;});}} MinBy;struct MaxOf_impl {template <class F> auto operator()(F&& f) {return Callable([&](auto v) {auto max_val = f(*begin(v));for (auto it = next(begin(v)); it != end(v); ++it) {if (auto val = f(*it); max_val < val) {max_val = val;}}return max_val;});}} MaxOf;struct MinOf_impl {template <class F> auto operator()(F&& f) {return Callable([&](auto v) {auto min_val = f(*begin(v));for (auto it = next(begin(v)); it != end(v); ++it) {if (auto val = f(*it); min_val > val) {min_val = val;}}return min_val;});}} MinOf;struct Count_impl {template <class V> auto operator()(const V& val) {return Callable([&](auto v) { return count(begin(v), end(v), val); });}} Count;struct CountIf_impl {template <class F> auto operator()(const F& f) {return Callable([&](auto v) { return count_if(begin(v), end(v), f); });}} CountIf;struct Index_impl {template <class V> auto operator()(const V& val) {return Callable([&](auto v) -> optional<int> {auto result = find(begin(v), end(v), val);return result != end(v) ? optional(result - begin(v)) : nullopt;});}template <class V> auto operator()(const V& val, size_t i) {return Callable([&](auto v) -> optional<int> {auto result = find(next(begin(v), i), end(v), val);return result != end(v) ? optional(result - begin(v)) : nullopt;});}} Index;struct IndexIf_impl {template <class F> auto operator()(const F& f) {return Callable([&](auto v) -> optional<int> {auto result = find_if(begin(v), end(v), f);return result != end(v) ? optional(result - begin(v)) : nullopt;});}} IndexIf;struct FindIf_impl {template <class F> auto operator()(const F& f) {return Callable([&](auto v) -> optional<typename decltype(v)::value_type> {auto result = find_if(begin(v), end(v), f);return result != end(v) ? optional(*result) : nullopt;});}} FindIf;struct Sum_impl {template <class F> auto operator()(F&& f) {return Callable([&](auto v) {return accumulate(next(begin(v)), end(v), f(*begin(v)),[&](const auto& a, const auto& b) { return a + f(b); });});}template <class T> friend auto operator|(T v, [[maybe_unused]] const Sum_impl& c) {return accumulate(begin(v), end(v), typename T::value_type{});}} Sum;struct Includes {template <class V> auto operator()(const V& val) {return Callable([&](auto v) { return find(begin(v), end(v), val) != end(v); });}} Includes;struct IncludesIf_impl {template <class F> auto operator()(const F& f) {return Callable([&](auto v) { return find_if(begin(v), end(v), f) != end(v); });}} IncludesIf;struct RemoveIf_impl {template <class F> auto operator()(const F& f) {return Callable([&](auto v) {v.erase(remove_if(begin(v), end(v), f), end(v));return v;});}} RemoveIf;struct Each_impl {template <class F> auto operator()(F&& f) {return Callable([&](auto v) {for (const auto& i : v) {f(i);}});}} Each;struct EachConsPair_impl {template <class T, class value_type = typename T::value_type>friend auto operator|(const T& v, EachConsPair_impl& c) {vector<pair<value_type, value_type>> result;if (size(v) >= 2) {result.reserve(size(v) - 1);for (size_t i = 0; i < size(v) - 1; ++i) {result.emplace_back(v[i], v[i + 1]);}}return result;}} EachConsPair;struct Select_impl {template <class F> auto operator()(F&& f) {return Callable([&](auto v) {using value_type = typename decltype(v)::value_type;vector<value_type> result;for (const auto& i : v) {if (f(i)) result.push_back(i);}return result;});}} Select;struct Map_impl {template <class F> auto operator()(F&& f) {return Callable([&](auto v) {using result_type = invoke_result_t<F, typename decltype(v)::value_type>;vector<result_type> result;result.reserve(size(v));for (const auto& i : v) {result.push_back(f(i));}return result;});}} Map;struct Indexed_impl {template <class T> friend auto operator|(const T& v, Indexed_impl& c) {using value_type = typename T::value_type;vector<pair<value_type, int>> result;result.reserve(size(v));int index = 0;for (const auto& i : v) {result.emplace_back(i, index++);}return result;}} Indexed;struct AllOf_impl {template <class F> auto operator()(F&& f) {return Callable([&](auto v) {for (const auto& i : v) {if (!f(i)) return false;}return true;});}} AllOf;struct AnyOf_impl {template <class F> auto operator()(F&& f) {return Callable([&](auto v) {for (const auto& i : v) {if (f(i)) return true;}return false;});}} AnyOf;struct NoneOf_impl {template <class F> auto operator()(F&& f) {return Callable([&](auto v) {for (const auto& i : v) {if (f(i)) return false;}return true;});}} NoneOf;struct Tally_impl {template <class F> auto operator()(size_t max_val) {return Callable([&](auto v) {vector<size_t> result(max_val);for (const auto& i : v) {result[static_cast<size_t>(i)]++;}return result;});}template <class T, class value_type = typename T::value_type>friend auto operator|(const T& v, Tally_impl& c) {map<value_type, size_t> result;for (const auto& i : v) {result[i]++;}return result;}} Tally;template <class T> auto operator*(const vector<T>& a, size_t n) {T result;for (size_t i = 0; i < n; ++i) {result.insert(result.end(), a.begin(), a.end());}return result;}auto operator*(string a, size_t n) {string result;for (size_t i = 0; i < n; ++i) {result += a;}return result;}template <class T, class U> auto& operator<<(vector<T>& a, const U& b) {a.insert(a.end(), all(b));return a;}template <class T> auto& operator<<(string& a, const T& b) {a.insert(a.end(), all(b));return a;}template <class T, class U> auto operator+(vector<T> a, const U& b) {a << b;return a;}template <class T> auto operator+(string a, const T& b) {a << b;return a;}#line 7 "/home/yuruhiya/programming/library/template/functions.cpp"using namespace std;template <class T = long long> constexpr T TEN(size_t n) {T result = 1;for (size_t i = 0; i < n; ++i) result *= 10;return result;}template <class T, class U,enable_if_t<is_integral_v<T> && is_integral_v<U>, nullptr_t> = nullptr>constexpr auto div_ceil(T n, U m) {return (n + m - 1) / m;}template <class T, class U> constexpr auto div_ceil2(T n, U m) {return div_ceil(n, m) * m;}template <class T> constexpr T triangle(T n) {return (n & 1) ? (n + 1) / 2 * n : n / 2 * (n + 1);}template <class T> constexpr T nC2(T n) {return (n & 1) ? (n - 1) / 2 * n : n / 2 * (n - 1);}template <class T, class U> constexpr auto middle(const T& l, const U& r) {return l + (r - l) / 2;}template <class T, class U, class V>constexpr bool in_range(const T& v, const U& lower, const V& upper) {return lower <= v && v < upper;}template <class T, enable_if_t<is_integral_v<T>, nullptr_t> = nullptr>constexpr bool is_square(T n) {T s = sqrt(n);return s * s == n || (s + 1) * (s + 1) == n;}template <class T = long long> constexpr T BIT(int b) {return T(1) << b;}template <class T> constexpr int BIT(T x, int i) {return (x & (T(1) << i)) ? 1 : 0;}template <class T> constexpr int Sgn(T x) {return (0 < x) - (0 > x);}template <class T, class U, enable_if_t<is_integral_v<U>, nullptr_t> = nullptr>constexpr T Pow(T a, U n) {assert(n >= 0);T result = 1;while (n > 0) {if (n & 1) {result *= a;n--;} else {a *= a;n >>= 1;}}return result;}template <class T, class U, enable_if_t<is_integral_v<U>, nullptr_t> = nullptr>constexpr T Powmod(T a, U n, T mod) {assert(n >= 0);if (a > mod) a %= mod;T result = 1;while (n > 0) {if (n & 1) {result = result * a % mod;n--;} else {a = a * a % mod;n >>= 1;}}return result;}template <class T> bool chmax(T& a, const T& b) {if (a < b) {a = b;return true;}return false;}template <class T> bool chmin(T& a, const T& b) {if (a > b) {a = b;return true;}return false;}template <class T> int sz(const T& v) {return v.size();}template <class T, class U> int lower_index(const T& a, const U& v) {return lower_bound(all(a), v) - a.begin();}template <class T, class U> int upper_index(const T& a, const U& v) {return upper_bound(all(a), v) - a.begin();}template <class T> auto Slice(const T& v, size_t i, size_t len) {return i < v.size() ? T(v.begin() + i, v.begin() + min(i + len, v.size())) : T();}template <class T, class U = typename T::value_type> U Gcdv(const T& v) {return accumulate(next(v.begin()), v.end(), U(*v.begin()), gcd<U, U>);}template <class T, class U = typename T::value_type> U Lcmv(const T& v) {return accumulate(next(v.begin()), v.end(), U(*v.begin()), lcm<U, U>);}namespace internal {template <class T, size_t N> auto make_vector(vector<int>& sizes, const T& init) {if constexpr (N == 1) {return vector(sizes[0], init);} else {int size = sizes[N - 1];sizes.pop_back();return vector(size, make_vector<T, N - 1>(sizes, init));}}} // namespace internaltemplate <class T, size_t N> auto make_vector(const int (&sizes)[N], const T& init = T()) {vector s(rbegin(sizes), rend(sizes));return internal::make_vector<T, N>(s, init);}#line 9 "/home/yuruhiya/programming/library/template/template.cpp"#if __has_include(<library/dump.hpp>)#include <library/dump.hpp>#define LOCAL#else#define dump(...) ((void)0)#endiftemplate <class T> constexpr T oj_local(const T& oj, const T& local) {#ifndef LOCALreturn oj;#elsereturn local;#endif}#line 5 "/home/yuruhiya/programming/library/Math/modint.cpp"using namespace std;template <int MOD> struct modint {using T = long long;T n;constexpr modint(const T x = 0) : n(x % MOD) {if (n < 0) n += MOD;}constexpr int get_mod() const {return MOD;}constexpr modint operator+() const {return *this;}constexpr modint operator-() const {return n ? MOD - n : 0;}constexpr modint& operator++() {if (MOD <= ++n) n = 0;return *this;}constexpr modint& operator--() {if (n <= 0) n = MOD;n--;return *this;}constexpr modint operator++(int) {modint t = *this;++*this;return t;}constexpr modint operator--(int) {modint t = *this;--*this;return t;}constexpr modint next() const {return ++modint(*this);}constexpr modint pred() const {return --modint(*this);}constexpr modint& operator+=(const modint& m) {n += m.n;if (n >= MOD) n -= MOD;return *this;}constexpr modint& operator-=(const modint& m) {n -= m.n;if (n < 0) n += MOD;return *this;}constexpr modint& operator*=(const modint& m) {n = n * m.n % MOD;return *this;}constexpr modint& operator/=(const modint& m) {T a = m.n, b = MOD, u = 1, v = 0;while (b) {T t = a / b;a -= t * b;swap(a, b);u -= t * v;swap(u, v);}n = n * u % MOD;if (n < 0) n += MOD;return *this;}constexpr bool operator==(const modint& m) const {return n == m.n;}constexpr bool operator!=(const modint& m) const {return n != m.n;}template <class M> constexpr modint pow(M m) const {if (0 <= m) {modint t = n, result = 1;while (m > 0) {if (m & 1) {result *= t;m--;} else {t *= t;m >>= 1;}}return result;} else {return (modint(1) / n).pow(-m);}}friend constexpr modint operator+(const modint& a, const modint& b) {return modint(a) += b;}friend constexpr modint operator-(const modint& a, const modint& b) {return modint(a) -= b;}friend constexpr modint operator*(const modint& a, const modint& b) {return modint(a) *= b;}friend constexpr modint operator/(const modint& a, const modint& b) {return modint(a) /= b;}friend ostream& operator<<(ostream& os, const modint<MOD>& m) {return os << m.n;}friend istream& operator>>(istream& is, modint<MOD>& m) {long long x;cin >> x;m = modint(x);return is;}};using mint = modint<1000000007>;using VM = vector<mint>;mint operator""_m(unsigned long long n) {return n;}#line 4 "/home/yuruhiya/programming/library/Graph/ShortestPath.cpp"#include <optional>#line 6 "/home/yuruhiya/programming/library/Graph/ShortestPath.cpp"using namespace std;vector<int> ShortestPath(const vector<vector<int>>& graph, int s,int inf = numeric_limits<int>::max()) {int V = graph.size();vector<int> dist(V, inf);dist[s] = 0;queue<int> que;que.push(s);while (!que.empty()) {int f = que.front();que.pop();for (auto e : graph[f]) {if (dist[e] == inf) {que.push(e);dist[e] = dist[f] + 1;}}}return dist;}int ShortestPathST(const vector<vector<int>>& graph, int s, int t,int inf = numeric_limits<int>::max()) {size_t n = graph.size();vector<int> dist(n, inf);dist[s] = 0;queue<int> que;que.push(s);while (!que.empty()) {int v = que.front();if (v == t) return dist[t];que.pop();for (auto u : graph[v]) {if (dist[u] == inf) {que.push(u);dist[u] = dist[v] + 1;}}}return dist[t];}#line 4 "a.cpp"int main() {ini(n, m);n++;VVI g(n), rg(n);vector<vector<tuple<int, mint, mint>>> graph(n);rep(i, m) {ini(u, v);mint l = in, a = in;graph[v].emplace_back(u, l, a);g[u].push_back(v);rg[v].push_back(u);}VI flag_n = ShortestPath(rg, n - 1, inf);if (flag_n[0] == inf) {out.exit(0);}VB visited(n), finished(n);auto dfs = [&](auto&& f, int v) -> void {visited[v] = true;for (auto u : g[v]) {if (flag_n[u] == inf) continue;if (visited[u] && !finished[u]) {out.exit("INF");}if (!visited[u]) {f(f, u);}}finished[v] = true;};dfs(dfs, 0);VI flag_0 = ShortestPath(g, 0, inf);vector<optional<mint>> dp(n), dp2(n);dp[0] = 0;dp2[0] = 1;auto rec = [&](auto&& f, int v) -> tuple<mint, mint> {if (flag_0[v] == inf) {return {0, 0};}if (!dp[v]) {dp[v] = 0;dp2[v] = 0;for (auto [u, a, b] : graph[v]) {if (flag_0[u] < inf) {auto [r1, r2] = f(f, u);dp[v].value() += (r1 + r2 * a) * b;dp2[v].value() += r2 * b;}}}return {dp[v].value(), dp2[v].value()};};out(get<0>(rec(rec, n - 1)));}