BOJ 9945 - Centroid of Point Masses [C++]

문제

링크

풀이

#include <iomanip>
#include <iostream>
using namespace std;
 
bool solve(int idx) {
  int n; cin >> n;
  if (n < 0) return false;
 
  double a = 0, b = 0, c = 0;
  for (int i=0; i<n; i++) {
    double x, y, m; cin >> x >> y >> m;
    a += x * m;
    b += y * m;
    c += m;
  }
 
  cout << "Case " << idx << ": ";
  cout << fixed << setprecision(2) << a / c << " ";
  cout << fixed << setprecision(2) << b / c << "\n";
  return true;
}
 
int main(void) {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
 
  int idx = 1;
  while (solve(idx++));
  return 0;
}