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Cod sursa(job #985141)
#include <cstdio>
#include <algorithm>
#include <vector>
#include <climits>
#include <set>
FILE *f=fopen("dijkstra.in","r");
FILE *g=fopen("dijkstra.out","w");
#define v first
#define cost second
using namespace std;
const int inf=INT_MAX/2;
struct cmp{bool operator()(const pair<int,int>A,const pair<int,int>B)const{return A.cost<B.cost;}};
set<pair<int,int>,cmp>S;
vector<pair<int,int> >lv[50001];
vector<pair<int,int> >::iterator it;
int D[50001],T[50001],viz[50001],n,m;
void dijkstra()
{
while(!S.empty())
{
int nodc=S.begin()->v;
viz[nodc]=1;S.erase(S.begin());
for(it=lv[nodc].begin();it!=lv[nodc].end();++it)
if(!viz[it->v]&&D[it->v]>D[nodc]+it->cost)
D[it->v]=D[nodc]+it->cost,
S.insert(make_pair(it->v,D[it->v]));
}
}
int main()
{
fscanf(f,"%d%d",&n,&m);
int a,b,c;
for(int i=1;i<=m;++i)
fscanf(f,"%d%d%d",&a,&b,&c),lv[a].push_back(make_pair(b,c));
for(int i=1;i<=n;++i)
D[i]=inf;D[1]=0;
S.insert(make_pair(1,0));dijkstra();
for(int i=2;i<=n;++i)
fprintf(g,"%d ",D[i]!=inf ? D[i]:0);
return 0;
}