BOJ 10185 - Focus [C++]

문제

링크

풀이

#include <iomanip>
#include <iostream>
using namespace std;
 
void solve(void) {
  double p, q; cin >> p >> q;
 
  cout << "f = " << fixed << setprecision(1) << p*q/(p+q) << "\n";
}
 
int main(void) {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
 
  int t; cin >> t;
  while (t--) solve();
  return 0;
}