题解 | 牛牛的水杯

#include <stdio.h>
int main(){
int a,b;
float v,d;
scanf("%d %d",&a,&b);
v=3.14*a*b*b;
d=(int)(10000.0/v);
if(10000.0/v==d){
    printf("%d",(int)(10000.0/v));
}else{
    printf("%d",(int)(10000.0/v)+1);
}
}