結果
問題 | No.1749 ラムドスウイルスの感染拡大 |
ユーザー |
|
提出日時 | 2021-11-19 23:17:49 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 6 ms / 2,000 ms |
コード長 | 5,567 bytes |
コンパイル時間 | 3,290 ms |
コンパイル使用メモリ | 215,564 KB |
最終ジャッジ日時 | 2025-01-25 20:56:39 |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 4 |
other | AC * 26 |
ソースコード
#pragma GCC optimize("O3")#include <bits/stdc++.h>// clang-format offusing namespace std;using ll = long long int;#define all(v) (v).begin(),(v).end()#define repeat(cnt,l) for(typename remove_const<typename remove_reference<decltype(l)>::type>::type cnt={};(cnt)<(l);++(cnt))#define rrepeat(cnt,l) for(auto cnt=(l)-1;0<=(cnt);--(cnt))#define iterate(cnt,b,e) for(auto cnt=(b);(cnt)!=(e);++(cnt))#define increase(cnt,b,e) for(auto cnt=(b);(cnt)<(e);++(cnt))#define decrease(cnt,b,e) for(auto cnt=(b);(e)<=(cnt);--(cnt))const long long MD = 998244353; const long double PI = 3.1415926535897932384626433832795L;template<typename T1, typename T2> inline ostream& operator <<(ostream &o, const pair<T1, T2> p) { o << '(' << p.first << ':' << p.second << ')';return o; }template<typename T> inline T& chmax(T& to, const T& val) { return to = max(to, val); }template<typename T> inline T& chmin(T& to, const T& val) { return to = min(to, val); }void bye(string s, int code = 0) { cout << s << endl; exit(code); }mt19937_64 randdev(8901016);template<typename T, typename Random = decltype(randdev), typename enable_if<is_integral<T>::value>::type* = nullptr>inline T rand(T l, T h, Random& rand = randdev) { return uniform_int_distribution<T>(l, h)(rand); }template<typename T, typename Random = decltype(randdev), typename enable_if<is_floating_point<T>::value>::type* = nullptr>inline T rand(T l, T h, Random& rand = randdev) { return uniform_real_distribution<T>(l, h)(rand); }template<typename T>static ostream& operator<<(ostream& o, const std::vector<T>& v) {o << "[ "; for(const auto& e : v) o<<e<<' '; return o << ']';}template <typename I> struct MyRangeFormat{ I b,e; MyRangeFormat(I _b, I _e):b(_b),e(_e){} };template<typename I> static ostream& operator<<(ostream& o, const MyRangeFormat<I>& f) {o << "[ "; iterate(i,f.b,f.e) o<<*i<<' '; return o << ']';}template <typename I> struct MyMatrixFormat{const I& p; long long n, m;MyMatrixFormat(const I& _p, long long _n, long long _m):p(_p),n(_n),m(_m){}};template<typename I> static ostream& operator<<(ostream& o, const MyMatrixFormat<I>& f) {o<<'\n';repeat(i,(f.n)) {repeat(j,f.m) o<<f.p[i][j]<<' ';o<<'\n';}return o;}struct LOG_t { ~LOG_t() { cout << endl; } };#define LOG (LOG_t(),cout<<'L'<<__LINE__<<": ")#define FMTA(m,w) (MyRangeFormat<decltype(m+0)>(m,m+w))#define FMTR(b,e) (MyRangeFormat<decltype(e)>(b,e))#define FMTV(v) FMTR(v.begin(),v.end())#define FMTM(m,h,w) (MyMatrixFormat<decltype(m+0)>(m,h,w))#if defined(_WIN32) || defined(_WIN64)#define getc_x _getc_nolock#define putc_x _putc_nolock#elif defined(__GNUC__)#define getc_x getc_unlocked#define putc_x putc_unlocked#else#define getc_x getc#define putc_x putc#endifclass MaiScanner {FILE* fp_;constexpr bool isvisiblechar(char c) noexcept { return (0x21<=(c)&&(c)<=0x7E); }public:inline MaiScanner(FILE* fp):fp_(fp){}template<typename T> void input_integer(T& var) noexcept {var = 0; T sign = 1;int cc = getc_x(fp_);for (; cc < '0' || '9' < cc; cc = getc_x(fp_))if (cc == '-') sign = -1;for (; '0' <= cc && cc <= '9'; cc = getc_x(fp_))var = (var << 3) + (var << 1) + cc - '0';var = var * sign;}inline int c() noexcept { return getc_x(fp_); }template<typename T, typename enable_if<is_integral<T>::value, nullptr_t>::type = nullptr>inline MaiScanner& operator>>(T& var) noexcept { input_integer<T>(var); return *this; }inline MaiScanner& operator>>(string& var) {int cc = getc_x(fp_);for (; !isvisiblechar(cc); cc = getc_x(fp_));for (; isvisiblechar(cc); cc = getc_x(fp_))var.push_back(cc);return *this;}template<typename IT> inline void in(IT begin, IT end) { for (auto it = begin; it != end; ++it) *this >> *it; }};class MaiPrinter {FILE* fp_;public:inline MaiPrinter(FILE* fp):fp_(fp){}template<typename T>void output_integer(T var) noexcept {if (var == 0) { putc_x('0', fp_); return; }if (var < 0)putc_x('-', fp_),var = -var;char stack[32]; int stack_p = 0;while (var)stack[stack_p++] = '0' + (var % 10),var /= 10;while (stack_p)putc_x(stack[--stack_p], fp_);}inline MaiPrinter& operator<<(char c) noexcept { putc_x(c, fp_); return *this; }template<typename T, typename enable_if<is_integral<T>::value, nullptr_t>::type = nullptr>inline MaiPrinter& operator<<(T var) noexcept { output_integer<T>(var); return *this; }inline MaiPrinter& operator<<(const char* str_p) noexcept { while (*str_p) putc_x(*(str_p++), fp_); return *this; }inline MaiPrinter& operator<<(const string& str) {const char* p = str.c_str();const char* l = p + str.size();while (p < l) putc_x(*p++, fp_);return *this;}template<typename IT> void join(IT begin, IT end, char sep = ' ') { for (bool b = 0; begin != end; ++begin, b = 1) b ? *this << sep << *begin :*this << *begin; }};MaiScanner scanner(stdin);MaiPrinter printer(stdout);// clang-format on//int N, M, T;//vector<pair<int, int>> edges;int main() {scanner >> N >> M >> T;edges.reserve(M);repeat(i, M) {int a, b; scanner >> a >> b;edges.emplace_back(a, b);}vector<int> dp1(N);dp1[0] = 1;repeat(i, T) {vector<int> dp2(N);for (auto p : edges) {dp2[p.second] += dp1[p.first];dp2[p.second] %= MD;dp2[p.first] += dp1[p.second];dp2[p.first] %= MD;}dp1 = move(dp2);}cout << dp1[0] << endl;return 0;}