Cod sursa(job #3325324)

Utilizator eddy_cimpanuCimpanu Eduardo Daniel eddy_cimpanu Data 25 noiembrie 2025 12:30:07
Problema Algoritmul lui Dijkstra Scor 10
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.25 kb
#include <bits/stdc++.h>
using namespace std;
#define infinite (1<<30)
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
int n,m,d[10001],p[10001];
vector<pair<int,int>> v[10001];
struct comparare
{
    bool operator()(int x,int y)
    {
        return d[x]>d[y];
    }
};
priority_queue <int, vector<int>, comparare>q;
void dijkstra(int start)
{
    for(int i=1; i<=n; i++)
        d[i]=infinite;

    d[start]=0;
    p[start]=1;
    q.push(start);
    while(!q.empty())
    {
        int nod=q.top();
        q.pop();
        for(int i=0; i<v[nod].size(); i++)
        {
            int vecin=v[nod][i].first;
            int cost=v[nod][i].second;
            if(d[nod]+cost<d[vecin])
            {
                d[vecin]=d[nod]+cost;
                if(p[vecin]==0)
                {
                    q.push(vecin);
                    p[vecin]=1;
                }
            }
        }
    }
}
int main()
{
    int x,y,z;
    fin>>n>>m;
    for(int i=1;i<=m;i++)
    {
        fin>>x>>y>>z;
        v[x].push_back(make_pair(y,z));
    }
    dijkstra(1);
    for(int i=2; i<=n; i++)
    {
        if(d[i]!=infinite)
            fout<<d[i]<<" ";
        else fout<<"-1 ";
    }
    return 0;
}