#include <stdio.h>
int main(){
int n,i,t;
double s,b,a,r;
scanf("%d",&t);
for(i=0;i<t;i++){
scanf("%d",&n);
r=(double)n/2;
a=n*n;
b=2*3.14*r*r;
s=a+b;
printf("%.2lf\n",s);
}
return 0;
}
int n,i,t;
double s,b,a,r;
scanf("%d",&t);
for(i=0;i<t;i++){
scanf("%d",&n);
r=(double)n/2;
a=n*n;
b=2*3.14*r*r;
s=a+b;
printf("%.2lf\n",s);
}
return 0;
}
全部评论
(2) 回帖