Pagini recente » Cod sursa (job #1301403) | Cod sursa (job #2050883) | Cod sursa (job #300843) | Cod sursa (job #487632) | Cod sursa (job #1840960)
#include <iostream>
#include <cstdio>
#include <vector>
#include <queue>
#include <cstring>
#define nmax 50005
#define inf 0x3f3f3f3f
#define cost first
#define vecin second
using namespace std;
int n,m,d[nmax];
vector<pair<int,int> > g[nmax];
priority_queue <pair<int,int> > q;
void citire()
{
int a,b,c;
scanf("%d%d",&n,&m);
for(int i=1;i<=m;i++)
{
scanf("%d%d%d",&a,&b,&c);
g[a].push_back(make_pair(c,b));
}
memset(d,inf,sizeof(d));
}
void dijkstra()
{
int k;
d[1]=0;
q.push(make_pair(0,1));
while(!q.empty())
{
k=q.top().vecin;
q.pop();
for(vector<pair<int,int> >::iterator ii=g[k].begin();ii!=g[k].end();++ii)
{
if(d[ii->vecin]>d[k]+ii->cost)
{
d[ii->vecin]=d[k]+ii->cost;
q.push(make_pair(-d[ii->vecin],ii->vecin));
}
}
}
}
void afisare()
{
for(int i=2;i<=n;i++)
{
if(d[i]>=inf)
printf("0 ");
else
printf("%d ",d[i]);
}
printf("\n");
}
int main()
{
freopen("dijkstra.in","r",stdin);
freopen("dijkstra.out","w",stdout);
citire();
dijkstra();
afisare();
return 0;
}