結果

問題 No.1364 [Renaming] Road to Cherry from Zelkova
ユーザー kappybarkappybar
提出日時 2021-01-23 17:12:28
言語 C++14
(gcc 12.3.0 + boost 1.83.0)
結果
WA  
実行時間 -
コード長 3,544 bytes
コンパイル時間 2,248 ms
コンパイル使用メモリ 194,176 KB
実行使用メモリ 37,164 KB
最終ジャッジ日時 2023-08-30 01:45:03
合計ジャッジ時間 13,293 ms
ジャッジサーバーID
(参考情報)
judge13 / judge12
このコードへのチャレンジ
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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 1 ms
4,376 KB
testcase_01 AC 1 ms
4,376 KB
testcase_02 AC 2 ms
4,380 KB
testcase_03 AC 2 ms
4,380 KB
testcase_04 AC 1 ms
4,376 KB
testcase_05 AC 2 ms
4,380 KB
testcase_06 AC 1 ms
4,380 KB
testcase_07 AC 1 ms
4,380 KB
testcase_08 AC 14 ms
4,724 KB
testcase_09 AC 7 ms
4,376 KB
testcase_10 AC 15 ms
4,380 KB
testcase_11 AC 13 ms
4,452 KB
testcase_12 AC 14 ms
4,376 KB
testcase_13 AC 205 ms
18,372 KB
testcase_14 AC 275 ms
17,660 KB
testcase_15 AC 277 ms
19,360 KB
testcase_16 AC 197 ms
14,048 KB
testcase_17 AC 100 ms
13,828 KB
testcase_18 AC 367 ms
24,708 KB
testcase_19 AC 360 ms
24,224 KB
testcase_20 AC 368 ms
24,496 KB
testcase_21 AC 361 ms
24,420 KB
testcase_22 AC 367 ms
24,964 KB
testcase_23 AC 79 ms
9,380 KB
testcase_24 AC 76 ms
5,728 KB
testcase_25 AC 214 ms
13,652 KB
testcase_26 AC 339 ms
18,180 KB
testcase_27 AC 251 ms
13,036 KB
testcase_28 AC 151 ms
10,772 KB
testcase_29 AC 236 ms
12,156 KB
testcase_30 AC 158 ms
11,216 KB
testcase_31 AC 104 ms
9,752 KB
testcase_32 AC 180 ms
10,356 KB
testcase_33 AC 318 ms
16,296 KB
testcase_34 AC 302 ms
17,968 KB
testcase_35 WA -
testcase_36 AC 317 ms
20,000 KB
testcase_37 AC 181 ms
9,392 KB
testcase_38 AC 245 ms
11,628 KB
testcase_39 AC 245 ms
11,344 KB
testcase_40 AC 245 ms
11,936 KB
testcase_41 AC 245 ms
11,588 KB
testcase_42 AC 245 ms
11,660 KB
testcase_43 AC 158 ms
37,164 KB
testcase_44 AC 128 ms
20,776 KB
testcase_45 AC 147 ms
30,060 KB
testcase_46 AC 36 ms
16,140 KB
testcase_47 AC 2 ms
4,380 KB
権限があれば一括ダウンロードができます

ソースコード

diff #

#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<(int)(n);i++)
#define chmin(x,y) x = min((x),(y));
#define chmax(x,y) x = max((x),(y));
using namespace std;
using ll = long long ;
using P = pair<int,int> ;
using pll = pair<long long,long long>;
const int INF = 1e9;
const long long LINF = 1e17;
const int MOD = 1000000007;
//const int MOD = 998244353;
const double PI = 3.14159265358979323846;

#include <atcoder/scc>
using namespace atcoder;

template<int mod> struct ModInt{
    long long x=0; 
    constexpr ModInt(long long x=0):x((x%mod+mod)%mod){}
    constexpr ModInt operator+(const ModInt& r)const{return ModInt(*this)+=r;}
    constexpr ModInt operator-(const ModInt& r)const{return ModInt(*this)-=r;}
    constexpr ModInt operator*(const ModInt& r)const{return ModInt(*this)*=r;}
    constexpr ModInt operator/(const ModInt& r)const{return ModInt(*this)/=r;}
    constexpr ModInt& operator+=(const ModInt& r){ if((x+=r.x)>=mod) x-=mod; return *this;}
    constexpr ModInt& operator-=(const ModInt& r){ if((x-=r.x)<0) x+=mod; return *this;}
    constexpr ModInt& operator*=(const ModInt& r){ if((x*=r.x)>=mod) x%=mod; return *this;}
    constexpr ModInt& operator/=(const ModInt& r){ return *this*=r.inv();}
    ModInt inv() const {
        long long s=x,sx=1,sy=0,t=mod,tx=0,ty=1;
        while(s%t!=0){
            long long temp=s/t,u=s-t*temp,ux=sx-temp*tx,uy=sy-temp*ty;
            s=t;sx=tx;sy=ty;
            t=u;tx=ux;ty=uy;
        }
        return ModInt(tx);
    }
    ModInt pow(long long n) const {
        ModInt a=1;
        ModInt b=*this;
        while(n>0){
            if(n&1) a*=b;
            b*=b;
            n>>=1;
        }
        return a;
    }
    friend constexpr ostream& operator<<(ostream& os,const ModInt<mod>& a) {return os << a.x;}
    friend constexpr istream& operator>>(istream& is,ModInt<mod>& a) {return is >> a.x;}
};
using mint = ModInt<MOD>;

struct edge{
    ll to,l,a;
};

mint dp[100005];
mint cnt[100005];

int main(){
    int n,m;
    cin >> n >> m;
    vector<vector<edge>> G(n+1);
    scc_graph graph(n+1);
    rep(i,m){
        ll u,v,l,a;
        cin >> u >> v >> l >> a;
        G[u].push_back(edge{v,l,a});
        graph.add_edge(u,v);
    }
    vector<vector<int>> topo = graph.scc();
    map<int,int> real_temp;
    rep(i,topo.size()){
        for(int j:topo[i]){
            real_temp[j] = i;
        }
    }
    vector<int> seen(topo.size(),0);
    vector<bool> dfs_res(topo.size(),false);
    int n_temp = real_temp[n];
    bool cycle = false;
    auto dfs = [&](auto&& dfs,int i) -> bool{
        if(seen[i] == 1) return dfs_res[i];
        seen[i] = 1;
        bool ok = false;
        if(i == n_temp) ok = true;
        for(int j:topo[i]){
            for(auto e:G[j]){
                int to = real_temp[e.to];
                if(seen[to] == 1) continue;
                bool temp = dfs(dfs,to);
                if(temp) ok = true;
            }
        }
        if(ok && (int)topo[i].size() > 1){
            cycle = true;
        }
        return dfs_res[i] = ok;
    };
    dfs(dfs,0);
    if(seen[n_temp] == 0){
        cout << 0 << endl;
        return 0;
    }
    if(cycle){
        cout << "INF" << endl;
        return 0;
    }
    dp[0] = 0;
    cnt[0] = 1;
    int zero_temp = real_temp[0];
    for(int ii=zero_temp;ii<topo.size();ii++){
        int i = topo[ii][0];
        for(auto e:G[i]){
            dp[e.to] += dp[i] * e.a + cnt[i] * e.a * e.l;
            cnt[e.to] += cnt[i] * e.a;
        }
    }
    cout << dp[n] << endl;

    return 0;
}
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