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Cod sursa(job #278128)
#include <fstream.h>
ifstream fin("frac.in");
ofstream fout("frac.out");
long long n,p,v[1000],i,d,j,sw,k;
int main() {
fin>>n>>p;
for (i=2;i<=n/2;i++)
if (n%i==0)
{ v[i]=1; d=i; }
for (i=1;i<=10000000;i++)
{
sw=0;
for (j=2;j<=d;j++)
if (v[j]!=0)
if (i%j==0)
{ sw=1; break; }
if (sw==0)
k++;
if (k==p)
{ fout<<i; break; }
}
return 0;
}