#include <bits/stdc++.h>
#define Loop(x,l,r) for (ll x = (l); x < (ll)(r); ++x)
#define LoopR(x,l,r) for (ll x = (r)-1; x >= (ll)(l); --x)
typedef long long ll;
typedef std::pair<int, int> pii;
typedef std::pair<ll , ll > pll;
using namespace std;
typedef long double ld;
typedef pair<ld, ld> pdd;
pdd in()
{
ll x, y;
cin >> x >> y;
return {x, y};
}
const int N = 200'010;
const int S = 8192;
double a[N], b[N];
ld x[N], r[N];
pdd f[N];
int len = 0;
void insert(pdd f)
{
::f[len] = f;
a[len] = f.first;
b[len] = f.second;
++len;
}
__attribute__((optimize("O3,unroll-loops"),target("avx2")))
ld get(ld x)
{
#define MIN(x, y) ((x)>(y)?(y):(x))
ld ans = 1e30;
Loop (i,0,len) {
ld tmp = a[i]*x + b[i];
ans = MIN(ans, tmp);
}
return ans;
#undef MIN
}
ld eval(pdd f, ld x)
{
return f.first * x + f.second;
}
void trim(ld x)
{
sort(f, f+len);
reverse(f, f+len);
int j = 0;
Loop (i,0,len) {
while (j && eval(f[j-1], x) - 1e-8 >= eval(f[i], x))
--j;
f[j++] = f[i];
}
len = j;
Loop (i,0,len) {
a[i] = f[i].first;
b[i] = f[i].second;
}
}
int main()
{
cin.tie(0) -> sync_with_stdio(false);
cout << fixed << setprecision(3);
int n;
cin >> n;
for (int s = 0; s < n; s += S) {
int f = min(s+S, n);
Loop (i,s,f) {
auto [x, r] = in();
if (i == s)
trim(x);
r = sqrt(r);
r = min(r, (ld)get(x));
cout << r*r << '\n';
insert({0.5/r, -x*0.5/r});
}
}
}
