Submission #915633

#	Time	Username	Problem	Language	Result	Execution time	Memory
915633		Trisanu_Das	Training (IOI07_training)	C++17	Compilation error	0 ms	0 KiB

training

#include <bits/stdc++.h>
using namespace std;
 
struct Road{
    int s, e, c;
    Road(){};
    Road(int x, int y, int z){
        s = x, e = y, c = z;
    }
    bool operator < (const Road &A) const{
        return s<A.s;
    }
} R[5010];
 
vector<int> G[1010];
int N,M,A,B,C,cnt,I[1010],X[1010],D[1010],xn,S,E,sum;
 
void DFS(int u, int p) {
    X[u] = xn++;
    for(int v : G[x]){
        if(v == p) continue;
        DFS(v, u);
    }
}
 
int main() {
    cin >> N >> M;
    for(int i = 0; i < M; i++){
        cin >> A >> B >> C;
        if(C) R[cnt++] = Road(A,B,C);
        else{
            G[A].push_back(B);
            G[B].push_back(A);
            I[A]++;
            I[B]++;
        }
        sum += C;
    }
    for(int i = 1; i <= N; i++){
      if(I[i] == 1){
        DFS(i,i);
        break;
      }
    }
    for(int i = 0; i < cnt; i++){
        R[i].s = X[R[i].s];
        R[i].e = X[R[i].e];
        if(R[i].s > R[i].e) swap(R[i].s, R[i].e);
    }
    sort(R, R + cnt);
    for(int i=0; i<cnt; i++){
        S = R[i].s;
        E = R[i].e;
        if((E - S) & 1) continue;
        for(int j = E; j < N; j++) D[j] = max(D[j], D[S] + R[i].c);
    }
    cout << sum - D[N-1] << '\n';
}

Compilation message (stderr)

training.cpp: In function 'void DFS(int, int)':
training.cpp:20:19: error: 'x' was not declared in this scope
   20 |     for(int v : G[x]){
      |                   ^