Cod sursa(job #3151292)

Utilizator Paul281881818818181991919191881818Draghici Paul Paul281881818818181991919191881818 Data 20 septembrie 2023 16:04:48
Problema Algoritmul lui Dijkstra Scor 50
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.26 kb
#include <fstream>
#include <vector>
#include <queue>    
#define INF (1 << 30) - 1
std::vector<std::vector<std::pair<int, int>>> V;
std::vector<int> dist, viz;
int main(){
    freopen("dijkstra.in", "r", stdin);
    int n, m;
    scanf("%d%d", &n, &m);
    V = std::vector<std::vector<std::pair<int, int>>> (n + 1);
    dist = viz = std::vector<int> (n + 1);
    for(int i = 1; i <= m; ++i){
        int x, y, c;
        scanf("%d%d%d", &x, &y, &c);
        V[x].push_back({y, c});
    }
    dist[1] = 0;
    for(int j = 2; j <= n; j++)
        dist[j] = INF;
    viz[1] = 0;
    while(1){
        int mn = INF, node;

        for(int i = 1; i <= n; i++){
            if(!viz[i]){
                if(mn > dist[i]){
                    mn = dist[i]; node = i;
                }
            }
        }
        if(mn == INF)
            break;
        viz[node] = 1;
        for(std::pair<int, int> it : V[node]){
            if(dist[it.first] > dist[node] + it.second){
                dist[it.first] = dist[node] + it.second;
            }
        }
    }
    freopen("dijkstra.out", "w", stdout);
    for(int i = 2; i <= n; i++){
        if(dist[i] == INF) 
            printf("0 ");
        else
            printf("%d ", dist[i]);
    }
}