Cod sursa(job #3197027)

Utilizator Bianca2507Negret Bianca Bianca2507 Data 25 ianuarie 2024 14:59:53
Problema Algoritmul lui Dijkstra Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.05 kb
#include <fstream>
#include <set>
#include <bitset>
#include <vector>
#define inf 1000000000
using namespace std;
ifstream cin("dijkstra.in");
ofstream cout("dijkstra.out");
int n,m,d[50004],x,y,c;
vector<pair<int,int>>l[50004];
set<pair<int,int>>s;
int main()
{
    cin>>n>>m;
    for(int i=1; i<=n; i++)
        d[i]=inf;
    for(int i=1; i<=m; i++)
    {
        cin>>x>>y>>c;
        l[x].push_back({y,c});
    }
    d[1]=0;

    s.insert({0,1});///cost,nod

    while(!s.empty())
    {
        int nod=s.begin()->second;
        s.erase(s.begin());
        for(int i=0; i<l[nod].size(); i++)
        {
            int vecin=l[nod][i].first;
            int cost=l[nod][i].second;
            if(d[vecin]>d[nod]+cost)
            {
                s.erase({d[vecin],vecin});
                d[vecin]=d[nod]+cost;
                s.insert({d[vecin],vecin});

            }
        }
    }
    for(int i=2; i<=n; i++)
        if(d[i]==inf)
            cout<<0<<" ";
        else
            cout<<d[i]<<" ";
    return 0;
}