Cod sursa(job #2302768)

Utilizator aditzu7Adrian Capraru aditzu7 Data 15 decembrie 2018 10:03:25
Problema Algoritmul Bellman-Ford Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.03 kb
#include <stdio.h>
#include <queue>
#include <vector>
using namespace std;
vector <pair<int,int> >v[50001];
priority_queue<pair<int,int>,vector<pair<int,int> >,greater<pair<int,int> > >h;
int viz[50001],nod,y,z,m,d[50001],k,i,x,a,n;
int main()
{
freopen("bellmanford.in","r",stdin);
freopen("bellmanford.out","w",stdout);
scanf("%d%d",&n,&m);
for(i=1;i<=m;i++){
    scanf("%d%d%d",&x,&y,&z);
    v[x].push_back(make_pair(z,y));
}
for(i=1;i<=n;i++)
    d[i]=1e9;
d[1]=0;
h.push(make_pair(0,1));
while(!h.empty()){
    nod=h.top().second;
    h.pop();
        for(i=0;i<v[nod].size();i++)

             if(d[nod]+v[nod][i].first<d[v[nod][i].second])
             {viz[v[nod][i].second]++;
                 d[v[nod][i].second]=d[nod]+v[nod][i].first;
        h.push(make_pair(d[v[nod][i].second],v[nod][i].second));
           if(viz[v[nod][i].second]==n){
            printf("Ciclu negativ!");
            return 0;
           }
             }

}

for(i=2;i<=n;i++)


    printf("%d ", d[i]);



    return 0;
}