Cod sursa(job #3196468)

Utilizator Cazacu2006RazvanRazvan Cazacu Cazacu2006Razvan Data 23 ianuarie 2024 22:40:31
Problema Algoritmul lui Dijkstra Scor 20
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.96 kb
#include <fstream>
#include <vector>
#include <queue>
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
int n,m,d[50001];
struct numar
{
    int x,c;
};
vector <numar> A[50001];
struct cmp
{
    bool operator () (const int& a, const int& b)
    {
        return d[a]>d[b];
    }
};
priority_queue< int, vector <int> , cmp> q;
int main()
{
    fin>>n>>m;
    for(int i=1;i<=m;i++)
    {
        int x,y,c;
        fin>>x>>y>>c;
        A[x].push_back({y,c});

    }
    for(int i=1;i<=n;i++)
    {
        d[i]=100000001;
    }
    d[1]=0;
    q.push(1);
    while(!q.empty())
    {
        int x=q.top();
        q.pop();
        for(auto i :A[x])
        {
            int y=i.x;
            int c=i.c;
            if(d[y]>d[x]+c)
            {
                d[y]=d[x]+c;
                q.push(y);
            }
        }
    }
    for(int i=2;i<=n;i++)
        fout<<d[i]<<" ";
    return 0;
}