Cod sursa(job #3241461)

Utilizator petruciungu@gmail.comPiatra Slefuita [email protected] Data 30 august 2024 17:00:53
Problema Algoritmul lui Dijkstra Scor 80
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.06 kb
#include <bits/stdc++.h>
using namespace std;
ifstream fin("dijkstra.in");
#define cin fin
ofstream fout("dijkstra.out");
#define cout fout
deque <long long int> d;
vector <pair<long long int, long long int>> v[50001];
long long int n, m, c, a, b, f, vc;
long long z[50001];
bool viz[50001];
int main(){
    cin>>n>>m;
    for(int i=0; i<m; i++){
        cin>>a>>b>>c;
        v[a].push_back(make_pair(b, c));
    }
    for(int i=2; i<=n; i++){
        z[i]=20001;
    }
    d.push_back(1);
    viz[1]=1;
    while(!d.empty()){
        f=d.front();
        d.pop_front();
        viz[f]=0;
        for(int i=0; i<v[f].size(); i++){
            if(z[v[f][i].first]>z[f]+v[f][i].second){
                z[v[f][i].first]=z[f]+v[f][i].second;
                if(viz[v[f][i].first]==0){
                    d.push_back(v[f][i].first);
                    viz[v[f][i].first]=1;
                }
            }
        }
    }
    for(int i=2; i<=n; i++){
        if(z[i]!=20001) cout<<z[i]<<' ';
        else cout<<'0'<<' ';
    }
    return 0;
}