#include <stdio.h>
int main(void){
    int work=0,days=0;
    scanf("%d%d",&work,&days);
    int temp = work;
    int i=0;
    for(i=0;i<days-1;i++){
        int Nokori = days-i;
        int Yaruki = temp/(Nokori*Nokori);
        temp -= Yaruki;
    }
    printf("%d",temp);
}