Cod sursa(job #2998882)

Utilizator TanasucaGeorgeAlexandruTanasucaGeorgeAlexandru TanasucaGeorgeAlexandru Data 10 martie 2023 10:40:50
Problema Algoritmul lui Dijkstra Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.93 kb
#include <bits/stdc++.h>
using namespace std;

ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");

priority_queue <pair<int,int>> q;
vector <pair<int,int>> a[50005];
int d[50005];
bitset<50005> viz;
int n,m,zed;

void Dijk(int x){
    d[x]=0;
    q.push({0,x});
    while(!q.empty()){
        zed=q.top().second;
        q.pop();
        if(!viz[zed]){
            for(auto i:a[zed]){
                if(d[i.second]>d[zed]+i.first){
                    d[i.second]=d[zed]+i.first;
                    q.push({-d[i.second],i.second});
                }
            }
        }
        viz[zed]=1;
    }
}

int main()
{
    int i,x,y,c;
    fin >> n>> m;
    for(i=1;i<=m;i++){
        fin >> x >> y >> c;
        a[x].push_back({c,y});
    }
    for(i=1;i<=n;i++) d[i]=1e9;
    Dijk(1);
    for(i=2;i<=n;i++){
        if(d[i]!=1e9) fout << d[i] << " ";
        else fout << "0 ";
    }
    return 0;
}