BOJ 16728 - Chaarshanbegaan at Cafebazaar [C++]

문제

링크

풀이

#include <cmath>
#include <iostream>
using namespace std;
 
int calc(double d) {
  for (int i=0; i<10; i++) {
    if (d <= 10 + 20 * i) return 10 - i;
  }
  return 0;
}
 
void solve(void) {
  int n; cin >> n;
 
  int ans = 0;
  while (n--) {
    int x, y; cin >> x >> y;
    ans += calc(hypot(x, y));
  }
  cout << ans;
}
 
int main(void) {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
 
  solve();
  return 0;
}