#include <stdio.h>
int main(void){
    int w, d;
    int i;
    int dw;
    double dy;
    scanf( "%d", &w );
    scanf( "%d", &d );
    for( i = 0; i < d; i++ ){
        dy = (double)( w / ( d - i ) / ( d - i ) );
        dw = (int)dy;
        w -= dw;
    }
    printf( "%d\n", dw );
}