제출 #1020019

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1020019		julia_08	Balloons (CEOI11_bal)	C++17	0 / 100	142 ms	2220 KiB

bal

#include <bits/stdc++.h>
using namespace std;

const double w = 0.0001;

double solve(int x1, int x2, double r2){
  return ((x2 - x1)*(x2 - x1))/(4*r2) - w;
}

int main(){
  cin.tie(0)->sync_with_stdio(0);

  int n; cin >> n;

  stack<pair<double, double>> q;

  for(int i=1; i<=n; i++){
    double x, r; cin >> x >> r;
    while(!q.empty() && q.top().second <= r){
      r = min(r, solve(x, q.top().first, q.top().second));
      q.pop();
    }

    if(!q.empty()) r = min(r, solve(x, q.top().first, q.top().second));

    cout << fixed << setprecision(3) << r << "\n";
    q.push({x, r});
  }

  return 0;
}

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