Cod sursa(job #2684018)

Utilizator Adrian.TrillMititean Adrian Adrian.Trill Data 12 decembrie 2020 15:53:10
Problema Algoritmul lui Dijkstra Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.39 kb
#include <fstream>
#include <queue>
#include <vector>
#include <string.h>
#define NMAX 50005
#define oo (1<<30)
using namespace std;
int n,m,d[NMAX];
bool InCoada[NMAX];
vector< pair<int,int> > G[NMAX];
ifstream cin("dijkstra.in");
ofstream cout("dijkstra.out");
struct compara
{
    bool operator()(int x,int y)
    {
        return d[x]>d[y];
    }
};
priority_queue<int, vector<int>, compara> coada;
void Dijkstra(int start)
{
    for(int i=1;i<=n;++i)
        d[i]=oo;
    d[start]=0;
    coada.push(start);
    InCoada[start]=true;
    while(!coada.empty())
    {
        int curent=coada.top();
        coada.pop();
        InCoada[curent]=false;
        for(size_t i=0;i<G[curent].size();++i)
        {
            int vecin=G[curent][i].first,cost=G[curent][i].second;
            if(d[curent]+cost<d[vecin])
            {
                d[vecin]=d[curent]+cost;
                if(InCoada[vecin]==false)
                {
                    coada.push(vecin);
                    InCoada[vecin]=true;
                }
            }
        }
    }
}
void Solve()
{
    cin>>n>>m;
    for(int i=1;i<=m;++i)
    {
        int x,y,c;
        cin>>x>>y>>c;
        G[x].push_back(make_pair(y,c));
    }
    Dijkstra(1);
    for(int i=2;i<=n;++i)
    if(d[i]==oo) cout<<"0 ";
    else cout<<d[i]<<" ";
}
int main()
{
    Solve();
    return 0;
}