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Cod sursa(job #402899)
#include<fstream>
#include<queue>
#include<vector>
#define MaxN 50005
#define INF 0x3f3f3f3f
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
vector< pair<int, int> > G[MaxN];
queue<int> qu;
int n,m,a,b,c,d[MaxN],i,X,viz[MaxN];
void bellmanFord()
{ vector< pair <int, int> >::iterator it;
memset(d, INF, sizeof(d));
memset(viz, 0, sizeof(viz));
d[1]=0;
qu.push(1);
while(!qu.empty())
{ X=qu.front();viz[X]=0;
for(it=G[X].begin();it!=G[X].end();it++)
if(d[X]+it->second<d[it->first])
{ d[it->first]=d[X]+it->second;
if(!viz[it->first])
{ viz[it->first]=1;
qu.push(it->first);
}
}
qu.pop();
}
}
int main()
{ fin>>n>>m;
for(i=1;i<=m;i++)
{ fin>>a>>b>>c;
G[a].push_back(make_pair(b,c));
}
bellmanFord();
for(i=2;i<=n;i++)
if(d[i]==INF) fout<<"0 ";
else fout<<d[i]<<' ';
}