// In the name of Allah
#include <bits/stdc++.h>
using namespace std;
typedef long long int ll;
typedef long double ld;
#define all(x) (x).begin(),(x).end()
#define F first
#define S second
#define pb push_back
#define sep ' '
#define endl '\n'
#define Mp make_pair
#define kill(x) cout << x << '\n', exit(0);
#define set_dec(x) cout << fixed << setprecision(x);
#define file_io(x,y) freopen(x, "r", stdin); freopen(y, "w", stdout);
int main() {
ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
int n;
cin >> n;
pair<ld, ld> arr[n];
for (int i = 0; i < n; i++) cin >> arr[i].F >> arr[i].S;
vector<int> st;
ld ans[n];
for (int i = 0; i < n; i++) {
ld r = arr[i].S;
while (st.size() > 0 && ans[st[st.size() - 1]] <= min(r, pow(arr[i].F - arr[st[st.size() - 1]].F, 2) / (4 * ans[st[st.size() - 1]]))) {
r = min(r, pow(arr[i].F - arr[st[st.size() - 1]].F, 2) / (4 * ans[st[st.size() - 1]]));
st.pop_back();
}
if (st.size() > 0) {
r = min(r, pow(arr[i].F - arr[st[st.size() - 1]].F, 2) / (4 * ans[st[st.size() - 1]]));
}
ans[i] = r;
st.pb(i);
}
set_dec(3);
for (int i = 0; i < n; i++) {
cout << ans[i] << endl;
}
return 0;
}
