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Cod sursa(job #66945)
#include<stdio.h>
int nr[1000005],div[1000005][8];
int main(){
freopen("divprim.in","r",stdin);
freopen("divprim.out","w",stdout);
int n,k,t,i;
for(i=2;i<1000002;i++){
if(nr[i]==0){
for(k=i;k<1000002;k+=i)
nr[k]++;
}
}
for(i=2;i<1000002;i++){
for(k=0;k<7;k++){
div[i][k]=div[i-1][k];
}
div[i][nr[i]]=i;
}
scanf("%d",&t);
for(i=0;i<t;i++){
scanf("%d %d",&n,&k);
printf("%d\n",div[n][k]);
}
return 0;
}