Cod sursa(job #3241464)

Utilizator McMeatGhenea Radu Stefan McMeat Data 30 august 2024 17:17:36
Problema Algoritmul lui Dijkstra Scor 10
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.02 kb
#include <bits/stdc++.h>
using namespace std;

ifstream f("dijkstra.in");
ofstream g("dijkstra.out");

vector<pair<int, int> > l[50001];
int inf=20001;
int n, m, a, b, c, v[50001], d[50001];


int main()
{
    f>>n>>m;
    for(int i=1;i<=m;i++)
    {
        f>>a>>b>>c;
        l[a].push_back(make_pair(b, c));
    }
    for(int i=1;i<=n;i++)
    {
        d[i]=inf;
    }
    d[1]=0;
    for(int i=1;i<=n;i++)
    {
        int mn=inf, mnp=-1;
        for(int j=1;j<=n;j++)
        {
            if(v[j]==0&&d[j]<mn)
            {
                mn=d[j];
                mnp=j;
            }
        }
        if(mn==inf)
            break;
        v[mnp]=1;
        for(int j=0;j<l[mnp].size();j++)
        {
            //cout<<mnp<<" ";
            int vecin=l[mnp][j].first;
            int cvecin=l[mnp][j].second;
            if(d[vecin]>d[mnp]+cvecin)
                d[vecin]=d[mnp]+cvecin;
        }
    }
    for(int i=2;i<=n;i++)
    {
        g<<d[i]<<" ";
    }
    return 0;
}