Cod sursa(job #2839231)

Utilizator CzryourbroCezar Enciu Czryourbro Data 25 ianuarie 2022 16:32:53
Problema Algoritmul Bellman-Ford Scor 20
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.1 kb
#include <bits/stdc++.h>


using namespace std;

int d[101],viz[101],ok;
int n,c,x,y,m;
vector<pair<int,int>>v[101];
void Dijsktra()
{
    ofstream cout("bellmanford.out");
    priority_queue<pair<int,int>,vector<pair<int,int>>,greater<pair<int,int>>>q;
    q.push({0,1});
    d[1]=0;
    while(q.size()>0)
    {
        int nod = q.top().second;
        q.pop();
        viz[nod]++;
        if(viz[nod]>=n)
        {
            cout<<"Ciclu negativ!";
            ok=1;
            break;
        }
        for(auto vecin : v[nod])
        {
            if(d[nod]+vecin.second<d[vecin.first])
            {
                d[vecin.first]=d[nod]+vecin.second;
                q.push({d[vecin.first],vecin.first});
            }
        }
    }
    if(ok==0)
        for(int i=2; i<=n; i++)
            cout<<d[i]<<" ";



}
int main()
{
    ifstream cin("bellmanford.in");


    cin>>n>>m;
    for(int i=1;i<=m;i++)
    {
        cin>>x>>y>>c;
        v[x].push_back({y,c});
    }
    for(int i=1; i<=n; i++)
        d[i] = INT_MAX;
    Dijsktra();
    return 0;
}