Cod sursa(job #3251532)

Utilizator rapatudorRapa Balan Tudor Florin rapatudor Data 26 octombrie 2024 10:47:45
Problema Algoritmul lui Dijkstra Scor 10
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.95 kb
#include <iostream>
#include <fstream>
#include <set>
#include <vector>

using namespace std;

ifstream f("dijkstra.in");
ofstream g("dijkstra.out");


vector<pair<int, int> > v[5005];
int n, m, x, y, c;
long long inf = 100000000;
set<pair< long long, int> >s;
bool viz[50005];
int dist[50005];


int main()
{
    f>>n>>m;
    for(int i = 1; i<=m; i++){
        f>>x>>y>>c;
        v[x].push_back({y, c});
    }
    dist[1] = 0;
    for(int i = 2; i<=n; i++) dist[i]  = inf;
    s.insert({0, 1});
    while(!s.empty()){
        int nod = s.begin()->second;
        s.erase(s.begin());
        for(auto ed:v[nod]){
            if(dist[ed.first]>dist[nod] + ed.second){
                s.erase({dist[ed.first], ed.first});
                dist[ed.first] = dist[nod] + ed.second;
                s.insert({dist[ed.first], ed.first});
            }
        }
    }
    for(int i = 2; i<=n; i++){
        if(dist[i]==inf) g<<0<<' ';
        g<<dist[i]<<' ';
    }
    return 0;
}