Cod sursa(job #3129641)

Utilizator tudor_costinCostin Tudor tudor_costin Data 15 mai 2023 13:47:52
Problema Algoritmul lui Dijkstra Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.94 kb
#include <iostream>
#include <fstream>
#include <vector>
#include <queue>
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
const int Nmax=50005;
int dist[Nmax];
vector<pair<int,int>> v[Nmax];
priority_queue<pair<int,int>> q;
int main()
{
    int n,m,x,y,c;
    fin>>n>>m;
    for(int i=1;i<=m;i++)
    {
        fin>>x>>y>>c;
        v[x].push_back({y,c});
    }
    for(int i=1;i<=n;i++)
    {
        dist[i]=1;
    }
    q.push({0,1});
    dist[1]=0;
    while(!q.empty())
    {
        int c=q.top().first;
        int a=q.top().second;
        q.pop();
        for(int i=0;i<v[a].size();i++)
        {
            if(dist[v[a][i].first]==1)
            {
                dist[v[a][i].first]=c-v[a][i].second;
                q.push({dist[v[a][i].first],v[a][i].first});
            }
        }
    }
    for(int i=2;i<=n;i++)
    {
        fout<<-dist[i]<<' ';
    }
    return 0;
}