Pagini recente » Cod sursa (job #1000515) | Cod sursa (job #3174695) | Cod sursa (job #2723689) | Cod sursa (job #1841068) | Cod sursa (job #1052853)
#include <iostream>
#include <fstream>
#include <vector>
#include <queue>
#define MAX_N 50001
using namespace std;
vector< pair<int,int> > v[MAX_N];
queue<int> coada;
int viz[MAX_N];
int dist[MAX_N];
int main()
{
int n,m,i,a,b,c;
ifstream f("dijkstra.in");
ofstream g("dijkstra.out");
f>>n>>m;
for(i=0;i<m;i++){
f>>a>>b>>c;
v[a].push_back(make_pair(b,c));
}
coada.push(1);
viz[1]=1;
for(i=1;i<=n;i++)
dist[i]=-1;
//cout<<v[1][0];
while(!coada.empty()){
int nod=coada.front();
for(i=0;i<v[nod].size();i++){
if(viz[v[nod][i].first]==0){
coada.push(v[nod][i].first);
viz[v[nod][i].first]=1;
if(dist[v[nod][i].first]==-1 || dist[v[nod][i].first]>v[nod][i].second){
if(dist[v[nod][i].first]==-1)
dist[v[nod][i].first]=0;
int act=dist[nod];
if(act==-1)
act=0;
dist[v[nod][i].first]+=act+v[nod][i].second; //v[nod][i].second;
}
}
}
coada.pop();
}
for(i=2;i<=n;i++)
g<<dist[i]<<" ";
//cout<<v[1][1].second;
return 0;
}