Cod sursa(job #2966353)

Utilizator MihaiCostacheCostache Mihai MihaiCostache Data 17 ianuarie 2023 09:55:23
Problema Algoritmul lui Dijkstra Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.94 kb
#include <bits/stdc++.h>
#define INF 10000005
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
vector < pair <int, int > > l[50001];
set < pair<int, int> > s;
int n, m, x, y, c, d[50001];
int main()
{
    fin>>n>>m;
    for(int i=1; i<=m; i++)
    {
        fin>>x>>y>>c;
        l[x].push_back({y, c});
    }
    for(int i=2; i<=n; i++)
        d[i]=INF;
    d[1]=0;
    s.insert({0, 1});
    while(!s.empty())
    {
        int nod=s.begin()->second;
        s.erase(s.begin());
        for(int i=0; i<l[nod].size(); i++)
        {
            int vecin=l[nod][i].first;
            int cost=l[nod][i].second;
            if(d[vecin]>d[nod]+cost)
            {
                s.erase({d[vecin], vecin});
                d[vecin]=d[nod]+cost;
                s.insert({d[vecin], vecin});
            }
        }
    }
    for(int i=1; i<=n; i++)
        fout<<d[i]<<" ";
    return 0;
}