#include <cstdio>
#include <stdio.h>
#include <stdbool.h>
#include <iostream>
#include <map>
#include <vector>
#include <climits>
#include <stack>
#include <string>
#include <queue>
#include <algorithm>
#include <set>
#include <unordered_set>
#include <unordered_map>
#include <cmath>
#include <cctype>
#include <bitset>
#include <iomanip>
#include <cstring>
#include <numeric>
#include <cassert>
using namespace std;
#define int long long
#define pii pair<int, int>
#define mp make_pair
#define pb push_back
#define fi first
#define se second
int32_t main(){
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
int n, a, b;
cin>>n;
stack<int> st;
vector<long double> ans(n), vect(n);
for (int i=0; i<n; ++i){
cin>>a>>b;
vect[i]=a;
ans[i]=b;
while (st.size()){
ans[i]=min(ans[i], (vect[st.top()]-vect[i])*(vect[st.top()]-vect[i])/(4*ans[st.top()]));
if (ans[i]>ans[st.top()])st.pop();
else break;
}
st.push(i);
}
for (auto a:ans)cout<<fixed<<setprecision(3)<<a<<"\n";
}
