제출 #844268

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
844268		AsandeiStefan	Balloons (CEOI11_bal)	C++17	10 / 100	258 ms	13924 KiB

bal

#include <iomanip>
#include <iostream>
#include <stack>
#include <vector>

struct sphere {
  long double x, max_r;
};

int n;
std::vector<sphere> v;
std::stack<sphere> s;

int main() {
  std::cin >> n;

  v = std::vector<sphere>(n);
  for (int i = 0; i < n; i++) {
    std::cin >> v[i].x >> v[i].max_r;
  }

  for (int i = 0; i < n; i++) {
    long double min_r = v[i].max_r;
    while (!s.empty()) {
      sphere prev = s.top();
      min_r = std::min(min_r, ((prev.x - v[i].x) * (prev.x - v[i].x)) /
                                  (4 * prev.max_r));
      if (min_r >= prev.max_r)
        s.pop();
      else
        break;
    }
    s.push(v[i]);
    std::cout << std::fixed << std::setprecision(5) << min_r << '\n';
  }

  return 0;
}

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• Subtask 2: 10 / 10
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