Cod sursa(job #2845022)

Utilizator Iulia_DianaIulia Diana Iulia_Diana Data 7 februarie 2022 09:43:24
Problema Algoritmul lui Dijkstra Scor 20
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.91 kb
#include <iostream>
#include <fstream>
#include <set>
#include <vector>
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
int d[50005];
set <pair <int, int>>q;
vector <pair <int, int>>g[50005];
int main()
{
    int n, m;  fin >> n >> m;
    for(int i=1; i<=n; i++)  d[i]=1000000;
    for(int i=1; i<=m; i++)
    {
        int x, y, c; fin >> x >> y >> c;
        g[x].push_back({y, c});
    }
    d[1]=0;
    q.insert({0, 1});
    while(!q.empty())
    {
        int nod=q.begin()->second, cost=q.begin()->first;
        q.erase(q.begin());
        for(int i=0; i<g[nod].size(); i++)
            if(cost+g[nod][i].second<d[g[nod][i].first])
            {
                d[g[nod][i].first]=cost+g[nod][i].second;
                q.insert({d[g[nod][i].first], g[nod][i].first});
            }
    }
    for(int i=2; i<=n; i++)  fout << d[i] << " ";
    return 0;
}