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Cod sursa(job #144905)
using namespace std;
#include <vector>
#include <string>
#include <cstdio>
#include <queue>
#define maxn 50001
#define oo 0x3f3f3f3f
#define pb push_back
struct nod { int x, c;nod(){}; nod(int a, int b){x=a;c=b;};};
vector<nod>a[maxn];
int d[maxn],n;
struct cmp{
bool operator()(const int &a, const int &b)const
{
if(d[a]>d[b]) return 1;
return 0;
}
};
void read()
{
int m, p, q, c;
freopen("dijkstra.in","r",stdin);
scanf("%d %d\n", &n, &m);
while(m--)
{
scanf("%d %d %d\n", &p, &q, &c);
a[p].pb(nod(q, c));
}
}
void bell()
{
priority_queue<int, vector<int>, cmp>Q;
Q.push(1);
bool use[maxn];
memset(use, 0,sizeof(use));
memset(d, oo, sizeof(d));
d[1]=0;
use[1]=1;
int u;
vector<nod>::iterator it;
while(!Q.empty())
{
u=Q.top();
Q.pop();
use[u]=0;
for(it=a[u].begin();it!=a[u].end();++it)
if(d[u]+it->c < d[it->x])
{
d[it->x]=d[u]+it->c;
if(!use[it->x])
{
Q.push(it->x);
use[it->x]=1;
}
}
}
int i;
for(i=1;i<=n;++i) if(d[i]==oo) d[i]=0;
freopen("dijkstra.out","w",stdout);
for(i=2;i<=n;++i)printf("%d ", d[i]);
printf("\n");
}
int main()
{
read();
bell();
return 0;
}