#include <stdio.h>
int yaruki(int W,int D){
  int y,t;
  if(D==1)return W;
  y=W/(D*D);
  t=W-y;
  return yaruki(t,D-1);
}
int main(void){

  int W,D;

  scanf("%d",&W);
  scanf("%d",&D);

  printf("%d\n",yaruki(W,D));

return 0;
}