結果
問題 | No.1340 おーじ君をさがせ |
ユーザー |
|
提出日時 | 2021-01-15 22:12:59 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
WA
(最新)
AC
(最初)
|
実行時間 | - |
コード長 | 4,026 bytes |
コンパイル時間 | 2,633 ms |
コンパイル使用メモリ | 204,568 KB |
最終ジャッジ日時 | 2025-01-17 19:34:02 |
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 * 3 |
other | AC * 57 WA * 2 |
ソースコード
#include <bits/stdc++.h>using namespace std;using ll = long long;using ld = long double;using VI = vector<int>;using VL = vector<ll>;using VS = vector<string>;template<class T> using PQ = priority_queue<T, vector<T>, greater<T>>;#define FOR(i,a,n) for(int i=(a);i<(n);++i)#define eFOR(i,a,n) for(int i=(a);i<=(n);++i)#define rFOR(i,a,n) for(int i=(n)-1;i>=(a);--i)#define erFOR(i,a,n) for(int i=(n);i>=(a);--i)#define SORT(a) sort(a.begin(),a.end())#define rSORT(a) sort(a.rbegin(),a.rend())#define fSORT(a,f) sort(a.begin(),a.end(),f)#define all(a) a.begin(),a.end()#define out(y,x) ((y)<0||h<=(y)||(x)<0||w<=(x))#define tp(a,i) get<i>(a)#ifdef _DEBUG#define line cout << "-----------------------------\n"#define stop system("pause")#define debug(x) print(x)#endifconstexpr ll INF = 1000000000;constexpr ll LLINF = 1LL << 60;constexpr ll mod = 1000000007;constexpr ll MOD = 998244353;constexpr ld eps = 1e-10;constexpr ld pi = 3.1415926535897932;template<class T>inline bool chmax(T& a, const T& b) { if (a < b) { a = b; return true; }return false; }template<class T>inline bool chmin(T& a, const T& b) { if (a > b) { a = b; return true; }return false; }inline void init() { cin.tie(nullptr); cout.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(15); }template<class T>inline istream& operator>>(istream& is, vector<T>& v) { for (auto& a : v)is >> a; return is; }template<class T, class U>inline istream& operator>>(istream& is, pair<T, U>& p) { is >> p.first >> p.second; return is; }template<class T>inline vector<T> vec(size_t a) { return vector<T>(a); }template<class T>inline vector<T> defvec(T def, size_t a) { return vector<T>(a, def); }template<class T, class... Ts>inline auto vec(size_t a, Ts... ts) { return vector<decltype(vec<T>(ts...))>(a, vec<T>(ts...)); }template<class T, class... Ts>inline auto defvec(T def, size_t a, Ts... ts) { return vector<decltype(defvec<T>(def, ts...))>(a, defvec<T>(def, ts...)); }template<class T>inline void print(const T& a) { cout << a << "\n"; }template<class T, class... Ts>inline void print(const T& a, const Ts&... ts) { cout << a << " "; print(ts...); }template<class T>inline void print(const vector<T>& v) { for (int i = 0; i < v.size(); ++i)cout << v[i] << (i == v.size() - 1 ? "\n" : " "); }template<class T>inline void print(const vector<vector<T>>& v) { for (auto& a : v)print(a); }inline string reversed(const string& s) { string t = s; reverse(all(t)); return t; }template<class T>inline T sum(const vector<T>& a, int l, int r) { return a[r] - (l == 0 ? 0 : a[l - 1]); }template<class T>inline void END(T s) { print(s); exit(0); }void END() { exit(0); }struct matrix {int n, m;vector<vector<ll>> dat;matrix(const vector<vector<ll>>& _a) : dat(_a) {n = dat.size(), m = dat.front().size();}matrix(const int& _n, const int& _m) : n(_n), m(_m) {dat = vec<ll>(n, m);}matrix() {}matrix operator*=(const matrix& a) {assert(m == a.n);matrix ret(vec<ll>(n, a.m));FOR(i, 0, n)FOR(k, 0, m)FOR(j, 0, a.m) {ret[i][j] += dat[i][k] * a.dat[k][j] % mod;if (mod <= ret[i][j])ret[i][j] -= mod;else if (ret[i][j] < 0)ret[i][j] += mod;}return *this = ret;}matrix operator*(const matrix& a) { return matrix(*this) *= a; }matrix pow(ll k) const {assert(n == m);matrix ret(vec<ll>(n, n)), a(dat);FOR(i, 0, n)ret[i][i] = 1;for (; 0 < k; k >>= 1) {if (k & 1)ret *= a;a *= a;}return ret;}vector<ll>& operator[](int i) { return dat[i]; }};int main() {init();int n, m; ll t; cin >> n >> m >> t;matrix mat(n, n);FOR(i, 0, m) {int a, b; cin >> a >> b;mat[a][b] = 1;}matrix cur(n, n);cur[0][0] = 1;auto mul = cur * mat.pow(t);int ans = 0;FOR(j, 0, n)if (mul[0][j])++ans;print(ans);return 0;}