Cod sursa(job #2459319)

Utilizator anamariatoaderAna Toader anamariatoader Data 22 septembrie 2019 12:09:30
Problema Algoritmul lui Dijkstra Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.16 kb
#include <fstream>
#include <vector>
#include <climits>
#include <queue>

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

int n,m,i,j,x,y,c,d[50005],Min,poz;
bool viz[50005];
struct arc{
    int v,c;
};
vector <arc> g[50005];
struct cmp{
    bool operator()(const int& a, const int& b)const{
        return d[a]>d[b];
    }
};

priority_queue <int, vector <int>, cmp> h;

int main(){
    fin>>n>>m;
    for(i=1;i<=m;i++){
        fin>>x>>y>>c;
        g[x].push_back({y,c});
    }
    for(i=2;i<=n;i++)
        d[i]=INT_MAX;
    h.push(1);
    while(!h.empty()){
        if(viz[h.top()]){
            h.pop();
            continue;
        }
        int nod=h.top();
        h.pop();
        viz[nod]=1;
        for(i=0;i<g[nod].size();i++){
            int nou=g[nod][i].v;
            int cost=g[nod][i].c;
            if(d[nou]>d[nod]+cost){
                d[nou]=d[nod]+cost;
                h.push(nou);
                viz[nou]=0;
            }
        }
    }
    for(i=2;i<=n;i++)
        if(d[i]==INT_MAX)
            fout<<0<<' ';
        else
            fout<<d[i]<<' ';
    return 0;
}