Cod sursa(job #114610)
#include<stdio.h>
#define LMAX 1000005
long div[LMAX+1],k; long t,n,i,j,sol[LMAX+1][9];
void generare()
{for(i=2;i<=100000;i++)
if(div[i]==0)
for(j=i;j<=LMAX;j+=i) div[j]++;
for(i=1;i<=7;i++)
for(j=2;j<=LMAX;j++)
if(div[j]==i) sol[j][i]=j;
else sol[j][i]=sol[j-1][i];
for(j=1;j<=LMAX;j++) sol[j][0]=1;
}
main()
{freopen("divprim.in","r",stdin);
freopen("divprim.out","w",stdout);
generare();
scanf("%ld",&t);
for(i=1;i<=t;i++)
{scanf("%ld %d",&n,&k);
printf("%ld\n",sol[n][k]);}
}