Cod sursa(job #3129706)

Utilizator tudor_costinCostin Tudor tudor_costin Data 15 mai 2023 16:28:23
Problema Algoritmul lui Dijkstra Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.11 kb
#include <iostream>
#include <fstream>
#include <vector>
#include <queue>
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
const int Nmax=50005;
long long dist[Nmax];
bool viz[Nmax];
vector<pair<long long,long long>> v[Nmax];
priority_queue<pair<long long,long long>> q;
int main()
{
    long long 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});
    while(!q.empty())
    {
        long long c=q.top().first;
        long long a=q.top().second;
        q.pop();
        if(dist[a]!=1){
                continue;
        }
        else{
            dist[a]=c;
            viz[a]=1;
        }
        for(int i=0;i<v[a].size();i++)
        {
            if(viz[v[a][i].first]==0)
            {
                q.push({c-v[a][i].second,v[a][i].first});
            }
        }
    }
    for(int i=2;i<=n;i++)
    {
        if(dist[i]!=1) fout<<-dist[i]<<' ';
        else fout<<0<<' ';
    }
    return 0;
}