BOJ 17283 - I am Groot [C++]

문제

링크

풀이

#include <iostream>
using namespace std;
 
void solve(void) {
  int l; cin >> l;
  int r; cin >> r;
 
  int ans = 0, exp = 1;
  while (l * r / 100 > 5) {
    l = l * r / 100;
    ans += l * (1 << exp++);
  }
  cout << ans;
}
 
int main(void) {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
 
  solve();
  return 0;
}