BOJ 11337 - Largest inscribed rectangle [C++]

문제

링크

풀이

#include <cmath>
#include <iomanip>
#include <iostream>
using namespace std;
 
void solve(void) {
  double r, b; cin >> r >> b;
 
  cout << fixed << setprecision(3) << ((sqrt(2) * r <= b) ? 2*r*r : b*sqrt(4*r*r-b*b)) << "\n";
}
 
int main(void) {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
 
  int t; cin >> t;
  while (t--) solve();
  return 0;
}