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 22:55:03 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 10 ms / 2,000 ms |
コード長 | 2,668 bytes |
コンパイル時間 | 4,494 ms |
コンパイル使用メモリ | 257,748 KB |
最終ジャッジ日時 | 2025-01-25 20:45:33 |
ジャッジサーバーID (参考情報) |
judge2 / judge2 |
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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
#include <atcoder/all>using namespace atcoder;#include <bits/stdc++.h>#define all(a) (a.begin()),(a.end())#define rall(a) (a.rbegin()),(a.rend())using namespace std;using ll=long long;using ld=long double;using pll=pair<ll,ll>;template<class T>bool chmax(T &a, const T &b) {if(a<b) {a=b; return 1;} return 0;}template<class T>bool chmin(T &a, const T &b) {if(b<a) {a=b; return 1;} return 0;}istream& operator >> (istream& is, modint1000000007& x) { unsigned int t; is >> t; x=t; return is; }istream& operator >> (istream& is, modint998244353& x) { unsigned int t; is >> t; x=t; return is; }istream& operator >> (istream& is, modint& x) { unsigned int t; is >> t; x=t; return is; }ostream& operator << (ostream& os, const modint1000000007& x) { os << x.val(); return os; }ostream& operator << (ostream& os, const modint998244353& x) { os << x.val(); return os; }ostream& operator << (ostream& os, const modint& x) { os << x.val(); return os; }template<class T1, class T2>istream& operator >> (istream& is, pair<T1,T2>& p) { is >> p.first >> p.second; return is; }template<class T1, class T2>ostream& operator << (ostream& os, const pair<T1,T2>& p) { os << p.first << " " << p.second; return os;}template<class T>istream& operator >> (istream& is, vector<T>& v) { for(T& x:v) is >> x; return is; }template<class T>ostream& operator << (ostream& os, const vector<T>& v) {for(int i=0;i<v.size();i++) {os << v[i] << (i+1 == v.size() ? "":" ");}return os;}template<class... A> void pt() { std::cout << "\n"; }template<class... A> void pt_rest() { std::cout << "\n"; }template<class T, class... A> void pt_rest(const T& first, const A&... rest) { std::cout << " " << first; pt_rest(rest...); }template<class T, class... A> void pt(const T& first, const A&... rest) { std::cout << first; pt_rest(rest...); }template<typename V, typename H> void resize(vector<V>& vec, const H head){ vec.resize(head); }template<typename V, typename H, typename ... T> void resize(vector<V>& vec, const H& head, const T ... tail){ vec.resize(head); for(auto& v: vec)resize(v, tail...); }static const ll inf=1e18+7;static const ld pi=acos(-1);static const ld eps=1e-10;using v1=vector<ll>;using v2=vector<v1>;using v3=vector<v2>;using v4=vector<v3>;int main(void) {cin.tie(nullptr);ios::sync_with_stdio(false);ll N,M,T;cin>>N>>M>>T;v2 g;resize(g,N);for(ll i=0;i<M;i++){ll a,b;cin>>a>>b;g[a].push_back(b);g[b].push_back(a);}using mint=modint998244353;vector<vector<mint>>dp;resize(dp,T+1,N);dp[0][0]=1;for(ll k=0;k<T;k++)for(ll i=0;i<N;i++)for(auto v:g[i])dp[k+1][v]+=dp[k][i];pt(dp[T][0]);}