Cod sursa(job #3324536)

Utilizator alexkAlexandru Kelemen alexk Data 22 noiembrie 2025 13:25:43
Problema Algoritmul lui Dijkstra Scor 50
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.08 kb
#include <fstream>
#include <vector>
using namespace std;
ifstream cin("dijkstra.in");
ofstream cout("dijkstra.out");
const int NMax=50000, oo=1e9;
vector<pair<int,int>> g[NMax+5];
int n, m, d[NMax+5];
bool use[NMax+5];
void Read()
{
    cin>>n>>m;
    for(int i=1;i<=m;i++)
    {
        int x, y, c;
        cin>>x>>y>>c;
        pair<int, int> p;
        g[x].push_back(make_pair(y,c));
    }
}
void Dijkstra()
{
    for(int i=2;i<=n;i++)
        d[i]=oo;
    for(int i=1;i<=n;i++)
    {
        int mini=oo, nod;
        for(int i=1;i<=n;i++)
        {
            if(d[i]<mini && use[i]==false)
            {
                mini=d[i];
                nod=i;
            }
        }
        use[nod]=true;
        for(auto i:g[nod])
        {
            int vecin=i.first, cost=i.second;
            d[vecin]=min(d[vecin], d[nod]+cost);
        }
    }
}
void Print()
{
    for(int i=2;i<=n;i++)
        if(d[i]==oo)d[i]=0;
    for(int i=2;i<=n;i++)
        cout<<d[i]<<' ';
}
int main()
{
    Read();
    Dijkstra();
    Print();
    return 0;
}