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Cod sursa(job #2175686)

Utilizator ARobertAntohi Robert ARobert Data 16 martie 2018 18:26:33
Problema Algoritmul lui Dijkstra Scor 10
Compilator cpp Status done
Runda Arhiva educationala Marime 0.92 kb
#include <bits/stdc++.h>
#define INF 0x3f3f3f3f

using namespace std;

ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
vector<pair<int,int>> v[50001];
priority_queue<pair<int,int>> t;
int n,m,a,b,c,d[50001],viz[50001];

int main()
{
    fin>>n>>m;
    for (int i=1;i<=m;i++)
    {
        fin>>a>>b>>c;
        v[a].push_back({b,c});
    }
    for (int i=2;i<=m;i++)
        d[i]=INF;
    t.push({0,1});
    while (!t.empty())
    {
        auto p=t.top();
        t.pop();
        if (!viz[p.second])
        {
            viz[p.second]=1;
            for (auto vec: v[p.second])
            if (!viz[vec.first])
            {
                if (d[vec.first]>d[p.second]+vec.second)
                    d[vec.first]=d[p.second]+vec.second;
                t.push({-d[vec.first], vec.first});
            }
        }
    }
    for (int i=2;i<=n;i++)
        fout<<d[i]<<" ";
    return 0;
}