Pagini recente » Cod sursa (job #1442595) | Cod sursa (job #2220150) | Cod sursa (job #281268) | Cod sursa (job #3158431) | Cod sursa (job #1882252)
#include <iostream>
#include <vector>
#include <fstream>
#include <queue>
#include <climits>
using namespace std;
#define oo INT_MAX
ifstream in("dijkstra.in");
ofstream out("dijkstra.out");
int n,m;
vector<pair<int,int>> L[50005];
int D[50005];
int U[50005];
void dijkstra(int st){
int nod;
priority_queue<pair<int,int>, vector<pair<int,int>>, greater<pair<int,int>>> PQ;
for(int i=1;i<=n;i++){
D[i]=oo;
}
PQ.push({0,st});
D[st]=0;
while(!PQ.empty()){
nod=PQ.top().second;
PQ.pop();
U[nod]=1;
for(auto vecin : L[nod]){
D[vecin.first]=min(D[vecin.first],D[nod]+vecin.second);
if(!U[vecin.first]){
PQ.push({D[vecin.first], vecin.first});
}
}
}
}
void read(){
int x,y,t;
in>>n>>m;
for(int i=1;i<=m;i++){
in>>x>>y>>t;
L[x].push_back({y,t});
}
}
int main(){
read();
dijkstra(1);
for(int i=2;i<=n;i++){
out<<D[i]<<" ";
}
return 0;
}