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Cod sursa(job #877545)
#include <cstdio>
#include <vector>
#include <queue>
#define N 50001
#define INF (1<<30)
using namespace std;
int n,d[N];
struct cmp
{
bool operator() (const int a,const int b) const
{
return d[a]>d[b];
}
};
vector < pair<int, int> >C[N];
priority_queue <int, vector <int>,cmp>Q;
void citire()
{
int m,x,y,c;
scanf("%d %d",&n,&m);
for(int i=0;i<m;i++)
{
scanf("%d %d %d",&x,&y,&c);
G[x].push_back(make_pair(y,c));
}
}
void dijkstra(int v)
{
for(int i=1;i<=n;i++)
{
d[i]=INF;
Q.push(i);
}
d[v]=0;
while(!Q.empty())
{
int x=Q.top();
Q.pop();
unsigned int m=G[x].size();
for(unsigned int i=0;i<m;i++)
{
int y=G[x][i].first;
int c=G[x][i].second;
if(d[y]>d[x]+c)
{
d[y]=d[x]+c;
Q.push(y);
}
}
}
}
void afisare()
{
for(int i=2;i<=n;i++)
{
if(d[i]==INF)
printf("0 ");
else
printf("%d ",d[i]);
}
}
int main()
{
freopen("dijkstra.in","r",stdin);
freopen("dijkstra.out","w",stdout);
citire();
dijkstra(1);
afisare();
return 0;
}