Submission #719377

#	Time	Username	Problem	Language	Result	Execution time	Memory
719377		YENGOYAN	Balloons (CEOI11_bal)	C++17	0 / 100	196 ms	5520 KiB

bal

/*
                                    //\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\\
                                    \\                                    //
                                    //  271828___182845__904523__53602__  \\
                                    \\  87___47____13______52____66__24_  //
                                    //  97___75____72______47____09___36  \\
                                    \\  999595_____74______96____69___67  //
                                    //  62___77____24______07____66__30_  \\
                                    \\  35___35____47______59____45713__  //
                                    //                                    \\
                                    \\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\//
*/
#include <iostream>
#include <vector>
#include <set>
#include <map>
#include <unordered_map>
#include <unordered_set>
#include <cmath>
#include <climits>
#include <algorithm>
#include <random>
#include <queue>
#include <deque>
#include <iomanip>
#include <string>
#include <tuple>
#include <bitset>
#include <chrono>
#include <ctime>
#include <fstream>
#include <stack>
#include <cstdio>
#include <functional>

using namespace std;
using LL = long long;
const int N = 1e5 + 5;
const LL mod = 1e9 + 7, inf = 1e18;

vector<int> dx = { 1, 0, -1, 0, 1, -1, 1, -1 };
vector<int> dy = { 0, -1, 0, 1, -1, 1, 1, -1 };

void solve() {
  int n; cin >> n;
  vector<double> x(n), r(n);
  for(int i = 0; i < n; ++i){
    cin >> x[i] >> r[i];
  }
  stack<int> st;
  for(int i = 0; i < n; ++i){
    double x1 = x[i], r1 = r[i];
    while(st.size()){
      double x2 = x[st.top()], r2 = r[st.top()];  
      r1 = min(r1, (x1 - x2) * (x1 - x2) / (4.0 * r2));
      if(r1 >= r2) st.pop();
      else break;
    }
    st.push(i);
    cout << r1 << " ";
  }
}

int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
 // int t; cin >> t; while (t--)
    solve();

}

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