Cod sursa(job #2981686)

Utilizator ana_valeriaAna Valeria Duguleanu ana_valeria Data 18 februarie 2023 15:22:04
Problema Algoritmul lui Dijkstra Scor 10
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.08 kb
#include <fstream>
#include <vector>
#include <set>
using namespace std;
ifstream cin ("dijkstra.in");
ofstream cout ("dijkstra.out");
vector <pair <int,int>> lista[100010];
set <pair <int,int>> s;
int dist[100010];
int main()
{
    int n,m,i,x,y,c,nod,vecin,cost;
    cin>>n>>m;
    for (i=1; i<=n; i++)
    {
        cin>>x>>y>>c;
        lista[x].push_back({c,y});
    }
    for (i=1; i<=n; i++)
        dist[i]=1000000010;
    dist[1]=0;
    s.insert({0,1});
    while (!s.empty())
    {
        nod=s.begin()->second;
        s.erase(s.begin());
        for (i=0; i<lista[nod].size(); i++)
        {
            vecin=lista[nod][i].second;
            cost=lista[nod][i].first;
            if (dist[vecin]>dist[nod]+cost)
            {
                if (dist[vecin]!=1000000010)
                    s.erase(s.find({dist[vecin],vecin}));
                dist[vecin]=dist[nod]+cost;
                s.insert({dist[vecin],vecin});
            }
        }
    }
    for (i=2; i<=n; i++)
        if (dist[i]!=1000000010)
            cout<<dist[i]<<" ";
        else
            cout<<"0 ";
    return 0;
}