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Cod sursa(job #181114)
#include<stdio.h>
#define nrmax 10001
#define nn 10000
int max,v[nrmax],mat[8][nrmax];
long int i,j;
void ciur()
{
for(i=2;i<nn;i++)
if(v[i]==0)
for(j=i+j;j<nn;j=j+i)
v[j]++;
}
void detmax()
{max=0;
for(int b=j;b>=1;b--)
if(v[b]==i){max=b;break;}
}
void caut()
{
for(i=1;i<=7;i++)
{
for(j=1;j<nn;j++)
{detmax();
mat[i][j]=max;
}
}
}
int main()
{
freopen("divprim.in","r",stdin);
freopen("divprim.out","w",stdout);
ciur();
caut();
long int v,k,n;
scanf("%ld ",&n);
for(i=1;i<=n;i++)
{
scanf("%ld %ld",&v,&k);
printf("%d\n",mat[k][v]);
}
return 0;
}