#include<bits/stdc++.h> using namespace std; using ll = long long; const int inf = 1e9; const double S = 1.3; double kw(double a){ return a * a; } int main(){ int n; cin >> n; vector<pair<int,double>>V; vector<pair<int,double>>V2; double last = 0; for(int i = 0; i < n; i++){ int x; double r; cin >> x >> r; for(int jj = (int)V2.size() - 1; jj >= max((int)V.size()-20,0); jj--){ auto j = V2[jj]; r = min(r, kw(x - j.first) / (4 * j.second)); } for(auto j : V){ r = min(r, kw(x - j.first) / (4 * j.second)); } last = x; while(!V.empty() && V.back().second <= r * S)V.pop_back(); V.push_back({x,r}); while(!V2.empty() && V2.back().second <= r)V2.pop_back(); V2.push_back({x,r}); cout << fixed << setprecision(4) << r << '\n'; } }