結果
問題 | No.1715 Dinner 2 |
ユーザー | keijak |
提出日時 | 2021-10-23 01:59:19 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 113 ms / 2,000 ms |
コード長 | 6,132 bytes |
コンパイル時間 | 2,358 ms |
コンパイル使用メモリ | 216,584 KB |
実行使用メモリ | 6,948 KB |
最終ジャッジ日時 | 2024-09-24 11:49:02 |
合計ジャッジ時間 | 4,543 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
6,816 KB |
testcase_01 | AC | 2 ms
6,940 KB |
testcase_02 | AC | 2 ms
6,940 KB |
testcase_03 | AC | 2 ms
6,940 KB |
testcase_04 | AC | 2 ms
6,944 KB |
testcase_05 | AC | 2 ms
6,940 KB |
testcase_06 | AC | 2 ms
6,940 KB |
testcase_07 | AC | 2 ms
6,940 KB |
testcase_08 | AC | 2 ms
6,940 KB |
testcase_09 | AC | 2 ms
6,944 KB |
testcase_10 | AC | 2 ms
6,944 KB |
testcase_11 | AC | 83 ms
6,940 KB |
testcase_12 | AC | 68 ms
6,940 KB |
testcase_13 | AC | 52 ms
6,940 KB |
testcase_14 | AC | 62 ms
6,944 KB |
testcase_15 | AC | 65 ms
6,940 KB |
testcase_16 | AC | 58 ms
6,940 KB |
testcase_17 | AC | 39 ms
6,940 KB |
testcase_18 | AC | 2 ms
6,940 KB |
testcase_19 | AC | 4 ms
6,940 KB |
testcase_20 | AC | 3 ms
6,940 KB |
testcase_21 | AC | 2 ms
6,944 KB |
testcase_22 | AC | 3 ms
6,944 KB |
testcase_23 | AC | 4 ms
6,940 KB |
testcase_24 | AC | 3 ms
6,944 KB |
testcase_25 | AC | 10 ms
6,940 KB |
testcase_26 | AC | 8 ms
6,940 KB |
testcase_27 | AC | 8 ms
6,944 KB |
testcase_28 | AC | 10 ms
6,948 KB |
testcase_29 | AC | 10 ms
6,944 KB |
testcase_30 | AC | 8 ms
6,940 KB |
testcase_31 | AC | 11 ms
6,944 KB |
testcase_32 | AC | 102 ms
6,940 KB |
testcase_33 | AC | 93 ms
6,940 KB |
testcase_34 | AC | 102 ms
6,940 KB |
testcase_35 | AC | 113 ms
6,940 KB |
testcase_36 | AC | 2 ms
6,940 KB |
testcase_37 | AC | 2 ms
6,940 KB |
testcase_38 | AC | 3 ms
6,940 KB |
ソースコード
#include <bits/stdc++.h> #define REP_(i, a_, b_, a, b, ...) \ for (int i = (a), END_##i = (b); i < END_##i; ++i) #define REP(i, ...) REP_(i, __VA_ARGS__, __VA_ARGS__, 0, __VA_ARGS__) #define ALL(x) std::begin(x), std::end(x) using Int = long long; using Real = long double; template<typename T, typename U> inline bool chmax(T &a, U b) { return a < b and ((a = std::move(b)), true); } template<typename T, typename U> inline bool chmin(T &a, U b) { return a > b and ((a = std::move(b)), true); } template<typename T> inline int ssize(const T &a) { return (int) a.size(); } inline void check(bool cond, const char *message = "!ERROR!") { if (not cond) { std::cout.flush(), std::cerr.flush(); throw std::runtime_error(message); } } template<class T> inline std::ostream &print_one(const T &x, char endc) { if constexpr (std::is_same_v<T, bool>) { return std::cout << (x ? "Yes" : "No") << endc; } else { return std::cout << x << endc; } } template<class T> inline std::ostream &print(const T &x) { return print_one(x, '\n'); } template<typename T, typename... Ts> std::ostream &print(const T &head, Ts... tail) { return print_one(head, ' '), print(tail...); } inline std::ostream &print() { return std::cout << '\n'; } template<typename Container> std::ostream &print_seq(const Container &a, const char *sep = " ", const char *ends = "\n", std::ostream &os = std::cout) { auto b = std::begin(a), e = std::end(a); for (auto it = std::begin(a); it != e; ++it) { if (it != b) os << sep; os << *it; } return os << ends; } template<typename T, typename = void> struct is_iterable : std::false_type {}; template<typename T> struct is_iterable<T, std::void_t<decltype(std::begin(std::declval<T>())), decltype(std::end(std::declval<T>()))>> : std::true_type { }; template<typename T, typename = std::enable_if_t< is_iterable<T>::value && !std::is_same<T, std::string>::value>> std::ostream &operator<<(std::ostream &os, const T &a) { return print_seq(a, ", ", "", (os << "{")) << "}"; } struct CastInput { template<typename T> operator T() const { T x; std::cin >> x; return x; } struct Sized { std::size_t n; template<typename T> operator T() const { T x(n); for (auto &e: x) std::cin >> e; return x; } }; Sized operator()(std::size_t n) const { return {n}; } } const in; #ifdef MY_DEBUG #include "debug_dump.hpp" #include "backward.hpp" backward::SignalHandling kSignalHandling; #else #define DUMP(...) #define cerr if(false)std::cerr #endif using namespace std; template<int sign = 1> struct Infinity { template<typename T> constexpr operator T() const { static_assert(sign == 1 or not std::is_unsigned_v<T>, "must be positive in an unsigned type"); if constexpr (std::numeric_limits<T>::has_infinity) { return T(sign) * std::numeric_limits<T>::infinity(); } else { static_assert(std::numeric_limits<T>::max() != T()); // max must be defined return T(sign) * (std::numeric_limits<T>::max() / T(4)); } } constexpr Infinity<sign * -1> operator-() const { return {}; } template<typename T> friend constexpr bool operator==(const T &x, const Infinity &y) { return x == T(y); } template<typename T> friend constexpr bool operator!=(const T &x, const Infinity &y) { return x != T(y); } }; constexpr Infinity<> kBig; // 2 largest items in an interval. struct Max2Op { using value_type = pair<Int, int>; using T = std::array<value_type, 2>; static T op(const T &x, const T &y) { std::array<value_type, 4> a = {x[0], x[1], y[0], y[1]}; std::sort(std::rbegin(a), std::rend(a)); return {a[0], a[1]}; } static constexpr T id() { return {pair{(Int) -kBig, -1}, pair{(Int) -kBig, -1}}; } }; template<class T> T floor_div(T x, T y) { check(y != 0); return x / y - (((x ^ y) < 0) and (x % y)); } // Binary search: // auto ok_bound = bisect(ok, ng, [&](i64 x) -> bool { return ...; }); template<class T, class F> auto bisect(T true_x, T false_x, F pred) -> T { static_assert(std::is_invocable_r_v<bool, F, T>); while (std::abs(true_x - false_x) > 1) { T mid = floor_div<T>(true_x + false_x, 2); if (pred(mid)) { true_x = std::move(mid); } else { false_x = std::move(mid); } } return true_x; } auto solve() -> Int { int n = in, D = in; vector<pair<Int, Int>> menu(n); Int pmin = 0; REP(i, n) { Int p = in, q = in; menu[i].first = p; menu[i].second = q; chmin(pmin, -p); } auto two_sort = [&](vector<pair<Int, int>> &v) { if (ssize(v) < 2) return; if (v[0].first < v[1].first) swap(v[0], v[1]); }; Int ans = bisect<Int>((Int) pmin * D, 0, [&](Int x) -> bool { auto dp = vector(2, vector(n, (Int) -kBig)); REP(i, n) { auto[pi, qi] = menu[i]; if (-pi < x) continue; dp[0][i] = -pi + qi; } REP(day, 1, D) { vector<pair<Int, int>> temp; REP(j, n) { auto z = dp[0][j]; if (z < x) continue; if (ssize(temp) < 2) { temp.push_back({z, j}); two_sort(temp); } else if (temp.back().first < z) { temp[1].first = z; temp[1].second = j; two_sort(temp); } } if (temp.empty()) return false; REP(j, n) { auto[pj, qj] = menu[j]; if (j != temp[0].second) { auto z = temp[0].first; if (z - pj >= x) chmax(dp[1][j], z - pj + qj); } else if (ssize(temp) >= 2) { auto z = temp[1].first; if (z - pj >= x) chmax(dp[1][j], z - pj + qj); } } dp[0].swap(dp[1]); dp[1].assign(n, (Int) -kBig); } REP(j, n) { if (dp[0][j] >= x) return true; } return false; }); check(ans != -kBig); return ans; } int main() { ios_base::sync_with_stdio(false), cin.tie(nullptr); cout << std::fixed << std::setprecision(18); const int T = 1;//in; REP(t, T) { auto ans = solve(); print(ans); } }