Cod sursa(job #2373932)

Utilizator Vlad3108Tir Vlad Ioan Vlad3108 Data 7 martie 2019 16:01:59
Problema Algoritmul lui Dijkstra Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.1 kb
#include <bits/stdc++.h>
#define LMAX 100005
using namespace std;
int n,dist[LMAX];
void Init(){
    for(int i=1;i<=n;++i)
        dist[i]=INT_MAX;
}
typedef pair<int,int> PII;
vector<pair<int,int> > G[LMAX];
void Dijkstra(int nod){
    priority_queue<PII,vector<PII>,greater<PII> > Q;
    dist[nod]=0;
    Q.push({0,nod});
    while(!Q.empty()){
        int nod=Q.top().second,cost=Q.top().first;
        Q.pop();
        if(dist[nod]!=cost)
            continue;
        for(auto it : G[nod])
            if(cost+it.second<dist[it.first]){
                dist[it.first]=cost+it.second;
                Q.push({dist[it.first],it.first});
            }
    }
}
int main(){
    freopen("dijkstra.in","r",stdin);
    freopen("dijkstra.out","w",stdout);
    int m;
    scanf("%d %d",&n,&m);
    for(int i=1;i<=m;++i){
        int u,v,cost;
        scanf("%d %d %d",&u,&v,&cost);
        G[u].push_back({v,cost});
    }
    Init();
    Dijkstra(1);
    for(int i=2;i<=n;++i)
        if(dist[i]!=INT_MAX)
            printf("%d ",dist[i]);
        else printf("0 ");
    return 0;
}