Cod sursa(job #3343017)

Utilizator Alexbora13Bora Ioan Alexandru Alexbora13 Data 26 februarie 2026 13:05:36
Problema Algoritmul Bellman-Ford Scor 35
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.21 kb
#include <bits/stdc++.h>

using namespace std;

ifstream fin("bellmanford.in");
ofstream fout("bellmanford.out");

const int NMAX = 50000;

int n, m;
int x, y, cost;
vector < pair<int,int> > v[NMAX+1];
int dist_min[NMAX+1];
int viz[NMAX+1];
int inq[NMAX+1];

int main()
{
    fin >> n >> m;
    for(int i=1; i<=m; i++)
    {
        fin >> x >> y >> cost;
        v[x].push_back(make_pair(y, cost));
    }
    for(int i=1; i<=n; i++)dist_min[i] = INT_MAX;
    dist_min[1] = 0;
    viz[1] = 1;
    inq[1] = 1;
    queue <int> q;
    q.push(1);
    while(!q.empty())
    {
        int nod = q.front();
        viz[nod] = 0;
        q.pop();
        for(auto a : v[nod])
        {
            if(dist_min[a.first] > dist_min[nod] + a.second)
            {
                dist_min[a.first] = dist_min[nod]+a.second;
                if(!viz[a.first])
                {
                    q.push(a.first);
                    viz[a.first] = 1;
                    inq[a.first]++;
                    if(inq[a.first] >= n){cout << "Ciclu negativ!"; return 0;}
                }
            }
        }
    }
    for(int i=2; i<=n; i++)
        fout << dist_min[i] << ' ';
    return 0;
}