题解 | #牛牛的水杯#

#include <stdio.h>
#define PI 3.14
int main() {
    int h = 0, r = 0;
    scanf("%d %d", &h, &r);
    double V = PI * h * r * r;
    printf("%d", (int)(10000 / V) + (10000 % (int)V == 0 ? 0 : 1));
    return 0;
}