Pagini recente » Cod sursa (job #606760) | Cod sursa (job #2267996) | Cod sursa (job #589176) | Cod sursa (job #348116) | Cod sursa (job #2803534)
#include <bits/stdc++.h>
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
vector<pair<int,int>>g[50001];
int D[50001],oo=2000000;
vector<bool>Use;
int N;
void read()
{
int m,x,y,c;
fin>>N>>m;
Use=vector<bool>(N+1);
for(int i=1; i<=m; i++)
{
fin>>x>>y>>c;
g[x].push_back(make_pair(y,c));
}
}
struct compara
{
bool operator()(int x,int y)
{
return D[x]>D[y];
}
};
priority_queue<int, vector<int>, compara>q;
void dijkstra()
{
int Nod;
for(int i = 1; i <= N; i++)
D[i] = oo;
D[1]=0;
q.push(1);
Use[1]=true;
while(!q.empty())
{
Nod=q.top();
q.pop();
Use[Nod]=false;
for(int i=0; i<g[Nod].size(); i++)
{
int Vecin=g[Nod][i].first,Cost=g[Nod][i].second;
if(D[Nod]+Cost<D[Vecin])
{
D[Vecin]=D[Nod]+Cost;
if(!Use[Vecin])
Use[Vecin]=true,q.push(Vecin);
}
}
}
}
void afisare()
{
for(int i=2; i<=N; i++)
if(D[i]==oo)
fout<<0<<' ';
else
fout<<D[i]<<' ';
}
int main()
{
read();
dijkstra();
afisare();
}