Cod sursa(job #3305830)

Utilizator vlad7654vladimir manescu vlad7654 Data 5 august 2025 17:10:47
Problema Algoritmul lui Dijkstra Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.05 kb
#include <bits/stdc++.h>
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
const int NMAX=5e4, INF=125e8+5;
vector<pair<int,int> > mat[NMAX+5];
vector<bool> vizitat(NMAX+5);
vector<int> dist(NMAX+5,INF);
void dijkstra(int nod){
    priority_queue<pair<int,int> > q;
    q.push({0, nod});
    while(!q.empty()){
        nod=q.top().second;
        q.pop();
        if(vizitat[nod]==0){
            for(auto it:mat[nod]){
                if(dist[nod]+it.second<dist[it.first]){
                    dist[it.first]=dist[nod]+it.second;
                    q.push({-dist[it.first], it.first});
                }
            }
            vizitat[nod]=1;
        }
    }
}
int main(){
    int n, m;
    fin>>n>>m;
    for(int i=1;i<=m;i++){
        int x, y, val;
        fin>>x>>y>>val;
        mat[x].push_back({y, val});
    }
    dist[1]=0;
    dijkstra(1);
    for(int i=2;i<=n;i++){
        if(dist[i]!=INF){
            fout<<dist[i]<<' ';
        }else{
            fout<<0<<' ';
        }
    }
}