Cod sursa(job #3366681)

Utilizator Hutanu_MaiaHutanu Ioana-Maia Hutanu_Maia Data 3 octombrie 2026 13:11:41
Problema Algoritmul lui Dijkstra Scor 90
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.04 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() (graf a,graf b)
    {
        return a.val>b.val;
    }
};
priority_queue<graf,vector<graf>,cmp> pq;
void dijkstra(int nod)
{
    for(int i=1; i<=n; i++)
        cost[i]=1e9;
    cost[nod]=0;
    pq.push({nod,0});
    while(!pq.empty())
    {
        nod=pq.top().nod;
        pq.pop();
        for(auto x:v[nod])
        {
            if(cost[x.nod]>cost[nod]+x.val)
            {
                cost[x.nod]=cost[nod]+x.val;
                pq.push({x.nod,cost[x.nod]});
            }
        }
    }
}
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++)
    {
        if(cost[i]==1e9)
            cost[i]=0;
        fout<<cost[i]<<' ';
    }
    return 0;
}