Lennot

input/code.cpp: In function 'int main(int, char**)':
input/code.cpp:30:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (long long i = 0; i < v[s].size(); i++) {
                                 ^

#include <iostream>
#include <vector>
#include <queue>

using namespace std;

int main(int argc, char** argv) {
    long long N, m, a, b, h;
    cin >> N >> m;
    vector<pair<long long,long long> > v[2*N+1];
    priority_queue<pair<long long,long long> > q;
    long long t[2*N+1], e[2*N+1];
    for (long long i = 0; i < m; ++i){
        cin >> a >> b >> h;
        v[a].push_back(make_pair(b+N, h));
        v[a+N].push_back(make_pair(b, 0));
    }
    for (long long i = 1; i <= 2*N; i++) {
        e[i] = 999999999999999;
        t[i] = 0;
    }
    e[1] = 0;
    q.push(make_pair(0,1));
    while (!q.empty()) {
        long long x = -q.top().first;
        long long s = q.top().second;
        q.pop();
        if (t[s]) continue;
        t[s] = 1;
        for (long long i = 0; i < v[s].size(); i++) {
            long long u = v[s].at(i).first;
            if (x+v[s].at(i).second < e[u]) {
                e[u] = x+v[s].at(i).second;
                q.push(make_pair(-e[u],u));
            }
        }
    }
    cout << min(e[N], e[2*N]) << "\n";
    return 0;
}

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 1

Verdict: ACCEPTED

Test 3

Group: 1

Verdict: ACCEPTED

Test 4

Group: 1

Verdict: ACCEPTED

Test 5

Group: 1

Verdict: ACCEPTED

Test 6

Group: 2

Verdict: ACCEPTED

Test 7

Group: 2

Verdict: ACCEPTED

Test 8

Group: 2

Verdict: ACCEPTED

Test 9

Group: 2

Verdict: ACCEPTED

Test 10

Group: 2

Verdict: ACCEPTED

Test 11

Group: 3

Verdict: ACCEPTED

Test 12

Group: 3

Verdict: ACCEPTED

Test 13

Group: 3

Verdict: ACCEPTED

Test 14

Group: 3

Verdict: ACCEPTED

Test 15

Group: 3

Verdict: ACCEPTED

Test 16

Group: 3

Verdict: ACCEPTED

Test 17

Group: 3

Verdict: ACCEPTED