Cod sursa(job #3366678)

Utilizator Hutanu_MaiaHutanu Ioana-Maia Hutanu_Maia Data 3 octombrie 2026 12:58:36
Problema Algoritmul lui Dijkstra Scor 20
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.96 kb
#include <bits/stdc++.h>
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
int n,m,cost[50005];
struct graf
{
    int nod,val;
};
vector<graf> v[50005];
struct cmp
{
    bool operator() (int a,int b)
    {
        return cost[a]>cost[b];
    }
};
priority_queue<int,vector<int>,cmp> pq;
void dijkstra(int nod)
{
    for(int i=1; i<=n; i++)
        cost[i]=1e9;
    cost[nod]=0;
    pq.push(nod);
    while(!pq.empty())
    {
        nod=pq.top();
        for(auto x:v[nod])
        {
            if(cost[x.nod]>cost[nod]+x.val)
            {
                cost[x.nod]=cost[nod]+x.val;
                pq.push(x.nod);
            }
        }
        pq.pop();
    }
}
int main()
{
    fin>>n>>m;
    for(int i=1; i<=m; i++)
    {
        int a,b,c;
        fin>>a>>b>>c;
        v[a].push_back({b,c});
    }
    dijkstra(1);
    for(int i=2; i<=n; i++)
        fout<<cost[i]<<' ';
    return 0;
}