This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define sp ' '
#define en '\n'
#define smin(a, b) a = min(a, b)
#define smax(a, b) a = max(a, b)
using namespace std;
const int N = 1e5 + 2;
const int M = 1e6 + 2;
const ll linf = 1e18;
ld F(ld xi, ld xj, ld rj) {
ld c = (xi - xj) * (xi - xj);
c /= 4 * rj;
return c;
}
int main() {
ios::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
int n; cin >> n;
stack<pair<ld, ld>> s;
for (int i = 0; i < n; i++) {
ld x, y;
cin >> x >> y;
while (!s.empty()) {
smin(y, F(x, s.top().first, s.top().second));
if (y >= s.top().second) s.pop();
else break;
}
cout << fixed << showpoint << setprecision(3) << y << en;
s.push({x, y});
}
return 0;
}
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