#include <stdio.h>

int main(void)
{
	int power;
	int work;
	int day;
	int i;
	
	scanf("%d %d", &work, &day);
	
	power = work / (day * day);
	
	while (day > 1) {
		power = work / (day * day); 
		
		work -= power;
		day--;
	}
	
	printf("%d\n", work);
	
	return 0;
}