Cod sursa(job #3152779)

Utilizator G3K0Airinei Gabriel Vlad G3K0 Data 26 septembrie 2023 18:58:36
Problema Algoritmul lui Dijkstra Scor 50
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.15 kb
#include <bits/stdc++.h>

using namespace std;
ifstream f("dijkstra.in");
ofstream g("dijkstra.out");
const int Nmax=5e4+5;
const  long long inf = 1e15;
vector< pair< long long,int>>G[Nmax];
long long dist[Nmax],v[Nmax];
int n,m;
int main()
{ cout<<INT_MAX;
    f>>n>>m;
    for(int i=1,x,y,c; i<=m; i++)
    {
        f>>x>>y>>c;
        G[x].push_back({c,y});


    }
    for(int i=2; i<=n; i++)
        dist[i]=inf;
    priority_queue<pair<long long,int >> heap;
    heap.push({0,1});
    dist[1]=0;

    while(!heap.empty())
    {
        int u=heap.top().second;

        if(v[u]==0)
        {
            v[u]=1;


            for(int i=0; i<G[u].size(); i++)
            {
                long long cost=G[u][i].first;
                int nod=G[u][i].second;
                if(dist[nod]>dist[u]+cost)
                {
                    dist[nod]=dist[u]+cost;
                    heap.push({-dist[nod],nod});

                }
            }
        }
        heap.pop();

    }
    for(int i=2; i<=n; i++)
        if(dist[i]==inf)
            g<<0<<' ';
        else
            g<<dist[i]<<' ';
    return 0;
}