魈凯KBS • 5个月前
using namespace std; int main(){
float r;
cin >> r;
int p = floor(r);
int sum = 0;
while(p>0){
int a = floor(sqrt(r*r-p*p));
sum += a;
p--;
}
sum *= 4;
cout << sum << endl;
return 0;
}
评论:
using namespace std; int main(){
float r;
cin >> r;
int p = floor(r);
int sum = 0;
while(p>0){
int a = floor(sqrt(r*r-p*p));
sum += a;
p--;
}
sum *= 4;
cout << sum << endl;
return 0;
}