#721672 (C++14) No.1340 おーじ君をさがせ

• 問題: No.1340 おーじ君をさがせ
• ユーザー: t98slider
• 提出日時: 2021-12-04 08:45:27
• 言語: C++14 (gcc 12.3.0 + boost 1.83.0)
• 結果: AC
• 実行時間: 67 ms / 2,000 ms
• コード長: 4,315 bytes
• コンパイル時間: 1,896 ms
• コンパイル使用メモリ: 176,312 KB
• 実行使用メモリ: 5,376 KB
• 最終ジャッジ日時: 2024-07-06 13:32:46
• 合計ジャッジ時間: 4,168 ms
• ジャッジサーバーID （参考情報）: judge2 / judge5

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	1 ms; 5,248 KB
testcase_01	AC	2 ms; 5,376 KB
testcase_02	AC	2 ms; 5,376 KB
testcase_03	AC	2 ms; 5,376 KB
testcase_04	AC	2 ms; 5,376 KB
testcase_05	AC	2 ms; 5,376 KB
testcase_06	AC	2 ms; 5,376 KB
testcase_07	AC	2 ms; 5,376 KB
testcase_08	AC	1 ms; 5,376 KB
testcase_09	AC	2 ms; 5,376 KB
testcase_10	AC	2 ms; 5,376 KB
testcase_11	AC	13 ms; 5,376 KB
testcase_12	AC	4 ms; 5,376 KB
testcase_13	AC	10 ms; 5,376 KB
testcase_14	AC	25 ms; 5,376 KB
testcase_15	AC	22 ms; 5,376 KB
testcase_16	AC	3 ms; 5,376 KB
testcase_17	AC	9 ms; 5,376 KB
testcase_18	AC	13 ms; 5,376 KB
testcase_19	AC	2 ms; 5,376 KB
testcase_20	AC	2 ms; 5,376 KB
testcase_21	AC	15 ms; 5,376 KB
testcase_22	AC	35 ms; 5,376 KB
testcase_23	AC	14 ms; 5,376 KB
testcase_24	AC	65 ms; 5,376 KB
testcase_25	AC	4 ms; 5,376 KB
testcase_26	AC	3 ms; 5,376 KB
testcase_27	AC	3 ms; 5,376 KB
testcase_28	AC	5 ms; 5,376 KB
testcase_29	AC	3 ms; 5,376 KB
testcase_30	AC	15 ms; 5,376 KB
testcase_31	AC	66 ms; 5,376 KB
testcase_32	AC	62 ms; 5,376 KB
testcase_33	AC	61 ms; 5,376 KB
testcase_34	AC	57 ms; 5,376 KB
testcase_35	AC	67 ms; 5,376 KB
testcase_36	AC	2 ms; 5,376 KB
testcase_37	AC	3 ms; 5,376 KB
testcase_38	AC	66 ms; 5,376 KB
testcase_39	AC	18 ms; 5,376 KB
testcase_40	AC	20 ms; 5,376 KB
testcase_41	AC	20 ms; 5,376 KB
testcase_42	AC	1 ms; 5,376 KB
testcase_43	AC	2 ms; 5,376 KB
testcase_44	AC	2 ms; 5,376 KB
testcase_45	AC	1 ms; 5,376 KB
testcase_46	AC	14 ms; 5,376 KB
testcase_47	AC	15 ms; 5,376 KB
testcase_48	AC	16 ms; 5,376 KB
testcase_49	AC	16 ms; 5,376 KB
testcase_50	AC	17 ms; 5,376 KB
testcase_51	AC	16 ms; 5,376 KB
testcase_52	AC	30 ms; 5,376 KB
testcase_53	AC	29 ms; 5,376 KB
testcase_54	AC	30 ms; 5,376 KB
testcase_55	AC	23 ms; 5,376 KB
testcase_56	AC	2 ms; 5,376 KB
testcase_57	AC	1 ms; 5,376 KB
testcase_58	AC	2 ms; 5,376 KB
testcase_59	AC	10 ms; 5,376 KB
testcase_60	AC	2 ms; 5,376 KB
testcase_61	AC	10 ms; 5,376 KB

ソースコード

#include <bits/stdc++.h>
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()
#define rep(i,n) for(int i=0;i<(int)(n);i++)
#define drep(i,j,n) for(int i=0;i<(int)(n-1);i++)for(int j=i+1;j<(int)(n);j++)
#define trep(i,j,k,n) for(int i=0;i<(int)(n-2);i++)for(int j=i+1;j<(int)(n-1);j++)for(int k=j+1;k<(int)(n);k++)
#define codefor int test;scanf("%d",&test);while(test--)
#define INT(...) int __VA_ARGS__;in(__VA_ARGS__)
#define LL(...) ll __VA_ARGS__;in(__VA_ARGS__)
#define yes(ans) if(ans)printf("yes\n");else printf("no\n")
#define Yes(ans) if(ans)printf("Yes\n");else printf("No\n")
#define YES(ans) if(ans)printf("YES\n");else printf("NO\n")
#define popcount(v) __builtin_popcount(v)
#define vector2d(type,name,h,...) vector<vector<type>>name(h,vector<type>(__VA_ARGS__))
#define vector3d(type,name,h,w,...) vector<vector<vector<type>>>name(h,vector<vector<type>>(w,vector<type>(__VA_ARGS__)))
using namespace std;
using ll = long long;
template<class T> using rpriority_queue = priority_queue<T, vector<T>, greater<T>>;
const int MOD=1000000007;
const int MOD2=998244353;
const int INF=1<<30;
const ll INF2=1LL<<60;
void scan(int& a){scanf("%d",&a);}
void scan(long long& a){scanf("%lld",&a);}
template<class T,class L>void scan(pair<T, L>& p){scan(p.first);scan(p.second);}
template<class T,class U,class V>void scan(tuple<T,U,V>& p){scan(get<0>(p));scan(get<1>(p));scan(get<2>(p));}
template<class T, size_t size> void scan(array<T, size>& a){ for(auto&& i : a) scan(i);}
template<class T> void scan(T& a){cin>>a;}
template<class T> void scan(vector<T>& vec){for(auto&& it:vec)scan(it);}
void in(){}
template <class Head, class... Tail> void in(Head& head, Tail&... tail){scan(head);in(tail...);}
void print(const int& a){printf("%d",a);}
void print(const long long& a){printf("%lld",a);}
void print(const double& a){printf("%.15lf",a);}
template<class T,class L>void print(const pair<T, L>& p){print(p.first);putchar(' ');print(p.second);}
template<class T> void print(const T& a){cout<<a;}
template<class T> void print(const vector<T>& vec){if(vec.empty())return;print(vec[0]);for(auto it=vec.begin();++it!= vec.end();){putchar(' ');print(*it);}}
void out(){putchar('\n');}
template<class T> void out(const T& t){print(t);putchar('\n');}
template <class Head, class... Tail> void out(const Head& head,const Tail&... tail){print(head);putchar(' ');out(tail...);}
template<class T> void dprint(const T& a){cerr<<a;}
template<class T> void dprint(const vector<T>& vec){if(vec.empty())return;cerr<<vec[0];for(auto it=vec.begin();++it!= vec.end();){cerr<<" "<<*it;}}
void debug(){cerr<<endl;}
template<class T> void debug(const T& t){dprint(t);cerr<<endl;}
template <class Head, class... Tail> void debug(const Head& head, const Tail&... tail){dprint(head);cerr<<" ";debug(tail...);}
ll intpow(ll a, ll b){ ll ans = 1; while(b){ if(b & 1) ans *= a; a *= a; b /= 2; } return ans; }
ll modpow(ll a, ll b, ll p){ ll ans = 1; while(b){ if(b & 1) (ans *= a) %= p; (a *= a) %= p; b /= 2; } return ans; }
ll modinv(ll a, ll m) {ll b = m, u = 1, v = 0;while (b) {ll t = a / b;a -= t * b; swap(a, b);u -= t * v; swap(u, v);}u %= m;if (u < 0) u += m;return u;}
ll updivide(ll a,ll b){return (a+b-1)/b;}
template<class T> void chmax(T &a,const T b){if(b>a)a=b;}
template<class T> void chmin(T &a,const T b){if(b<a)a=b;}

//行列の積
template<class T> vector<vector<T>> Matrix_Multiplication(vector<vector<T>> a,vector<vector<T>> b){
    int n=a.size(),m=a[0].size(),l=b[0].size();
    vector<vector<T>> ret(n,vector<T>(l,0));
    for(int i=0;i<n;i++){
        for(int j=0;j<l;j++){
            for(int k=0;k<m;k++){
                ret[i][j]|=(a[i][k]&b[k][j]);
            }
        }
    }
    return ret;
}

//行列aを正方行列と仮定して行列の累乗を計算する
template<class T> vector<vector<T>> Matrix_Exponentiation(vector<vector<T>> a,ll b){
    int n=a.size();
    vector<vector<T>> ret(n,vector<T>(n,0));
    for(int i=0;i<n;i++)ret[i][i]=1;
    while(b){
        if(b&1)ret=Matrix_Multiplication(ret,a);
        a=Matrix_Multiplication(a,a);
        b/=2;
    }
    return ret;
}

int main(){
    LL(n,m,t);
    vector2d(int,A,n,n,0);
    int u,v;
    rep(i,m){
        in(u,v);
        A[u][v]=1;
    }
    auto B=Matrix_Exponentiation(A,t);
    out(count(all(B[0]),1));
}