Cod sursa(job #3366803)

Utilizator o_ctFerent Octavian o_ct Data 4 octombrie 2026 13:34:29
Problema Algoritmul lui Dijkstra Scor 10
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.9 kb
#include <bits/stdc++.h>
#define N 50005
#define M 250005
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
vector<pair<int,int>>g[N];
int n,m;
int x,y,c;
int tata[N],d[N],Q[N];
void Dijkstra(int s) ///s=sursa
{
    for(int i=1; i<=n; i++)
        d[i]=2e9,tata[i]=0,Q[i]=0;
    d[s]=0;

    int ct=n;
    while(ct)
    {
        int dmin=2e9,u;
        for(int i=1; i<=n; i++)
            if(d[i]<dmin && Q[i]==0) dmin=d[i],u=i;
        Q[u]=1,ct--;
        for(auto next:g[u])
        {
            int v=next.first;
            int w=next.second;
            if(!Q[v] && d[u]+w<d[v]) d[v]=d[u]+w,tata[v]=u;
        }
    }

}
int main()
{
    fin>>n>>m;
    for(int i=1; i<=m; i++)
    {
        fin>>x>>y>>c;
        g[x].push_back({y,c});
    }
    Dijkstra(1);
    for(int i=2; i<=n; i++)
        if(d[i]!=2e9) fout<<d[i]<<" ";
    return 0;
}