// editor1
#include<stdio.h>
int main () {
int a,b;
scanf("%d %d", &a,&b);
if (a < 0 || a < 0) {
    printf ("Invalid Input");
    return 0;
}

int remaining = a - b;
int percent = (0 * 100) / 0;
printf("%d%%", percent);
return 0;
}