Submission #1647455


Source Code Expand

#include<bits/stdc++.h>
#define rep(i,n) for(int i=0; i<n;i++)
using namespace std;
using ll = long long;
#define int ll
int INF = -LONG_MAX/100;
signed main(){
    using pii = pair<int,int>;
    using piii  = pair<pii,int>;
    vector<piii>edge;
    int n,m; cin>>n>>m;
    rep(i,m){
        piii hoge; cin>>hoge.first.first>>hoge.first.second>>hoge.second;
        edge.push_back(hoge);
    }
    vector<int>d(n,INF);
    d[0]=0;
    for(int v=0; v<n*3;v++){
        bool update=false;
        rep(i,edge.size()){
            int from=edge[i].first.first-1;
            int to=edge[i].first.second-1;
            int cost=edge[i].second;
            if(d[from]==INF)continue;
            if(d[to]<d[from]+cost){
                d[to]=d[from]+cost;
                if(to==n-1)update=true;
            }
        }
        if(update&&v>2*n)return puts("inf")*0;
    }
    cout<<d[--n]<<endl;
}

Submission Info

Submission Time
Task D - Score Attack
User yebityon
Language C++14 (GCC 5.4.1)
Score 400
Code Size 926 Byte
Status AC
Exec Time 18 ms
Memory 384 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 400 / 400
Status
AC × 3
AC × 30
Set Name Test Cases
Sample sample_01.txt, sample_02.txt, sample_03.txt
All sample_01.txt, sample_02.txt, sample_03.txt, subtask_1_1.txt, subtask_1_10.txt, subtask_1_11.txt, subtask_1_12.txt, subtask_1_13.txt, subtask_1_14.txt, subtask_1_15.txt, subtask_1_16.txt, subtask_1_17.txt, subtask_1_18.txt, subtask_1_19.txt, subtask_1_2.txt, subtask_1_20.txt, subtask_1_21.txt, subtask_1_22.txt, subtask_1_23.txt, subtask_1_24.txt, subtask_1_25.txt, subtask_1_26.txt, subtask_1_27.txt, subtask_1_3.txt, subtask_1_4.txt, subtask_1_5.txt, subtask_1_6.txt, subtask_1_7.txt, subtask_1_8.txt, subtask_1_9.txt
Case Name Status Exec Time Memory
sample_01.txt AC 1 ms 256 KB
sample_02.txt AC 1 ms 256 KB
sample_03.txt AC 1 ms 256 KB
subtask_1_1.txt AC 2 ms 256 KB
subtask_1_10.txt AC 1 ms 256 KB
subtask_1_11.txt AC 2 ms 256 KB
subtask_1_12.txt AC 7 ms 384 KB
subtask_1_13.txt AC 1 ms 256 KB
subtask_1_14.txt AC 6 ms 256 KB
subtask_1_15.txt AC 10 ms 384 KB
subtask_1_16.txt AC 1 ms 256 KB
subtask_1_17.txt AC 1 ms 256 KB
subtask_1_18.txt AC 9 ms 384 KB
subtask_1_19.txt AC 8 ms 384 KB
subtask_1_2.txt AC 6 ms 256 KB
subtask_1_20.txt AC 1 ms 256 KB
subtask_1_21.txt AC 6 ms 256 KB
subtask_1_22.txt AC 18 ms 384 KB
subtask_1_23.txt AC 1 ms 256 KB
subtask_1_24.txt AC 8 ms 384 KB
subtask_1_25.txt AC 5 ms 256 KB
subtask_1_26.txt AC 6 ms 256 KB
subtask_1_27.txt AC 9 ms 256 KB
subtask_1_3.txt AC 4 ms 256 KB
subtask_1_4.txt AC 6 ms 256 KB
subtask_1_5.txt AC 3 ms 256 KB
subtask_1_6.txt AC 6 ms 256 KB
subtask_1_7.txt AC 5 ms 256 KB
subtask_1_8.txt AC 6 ms 256 KB
subtask_1_9.txt AC 1 ms 256 KB