Cod sursa(job #3333706)

Utilizator G3K0Airinei Gabriel Vlad G3K0 Data 14 ianuarie 2026 22:13:34
Problema Algoritmul lui Dijkstra Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.08 kb
#include <bits/stdc++.h>

using namespace std;
ifstream f("dijkstra.in");
ofstream g("dijkstra.out");
const int Nx=5e4+5;
const int inf=1e9;
vector <pair<int,int>> G[Nx];
int dist[Nx],vi[Nx];
int n,m,s;
int main()
{   s=1;
    f>>n>>m;
    for(int i=0,u,v,c; i<m; i++)
    {
        f>>u>>v>>c;
        G[u].push_back({c,v});
    }
    priority_queue<pair<long long,int>>heap;
    for(int i=1; i<=n; i++)
        dist[i]=inf;

    heap.push({0,s});
    dist[s]=0;
    while(!heap.empty())
    {
        int u=heap.top().second;
        if(vi[u]==0)
        {
            vi[u]=1;
            for(int i=0; i<G[u].size(); i++)
            {
                intcost=G[u][i].first;
                int v=G[u][i].second;
                if (dist[v]>dist[u]+cost)
                {
                    dist[v]=dist[u]+cost;
                    heap.push({-dist[v],v});
                }
            }
        }
        heap.pop();
    }
    for(int i=2; i<=n; i++)

        if(dist[i]>=inf)
            g<<"0"<<' ';
        else g<<dist[i]<<' ';

    return 0;
}