#include<bits/stdc++.h>
using namespace std;
using ld = long double;
int main(){
ios::sync_with_stdio(false);
cin.tie(nullptr);
int N;
cin >> N;
vector<int> x(N), r(N);
vector<ld> ans(N);
for(int i = 0;i < N;i++){
cin >> x[i] >> r[i];
}
ans[0] = r[0];
cout << fixed << setprecision(3) << ans[0] << '\n';
#define X first
#define Y second
auto d = [&](pair<ld, ld> A, pair<ld, ld> B)->ld{
return (A.X-B.X)*(A.X-B.X)+(A.Y-B.Y)*(A.Y-B.Y);
};
/*
3
0 9
8 1
13 7
*/
auto Calc = [&](int i, int j)->ld{
ld radius_j = ans[j];
pair<ld, ld> centre_j = {x[j], radius_j};
ld lo = 0, hi = r[i], mid;
for(int rep = 0;rep < 70;++rep){
mid = (lo + hi) / 2;
ld radius_i = mid;
pair<ld, ld> centre_i = {x[i], radius_i};
if(d(centre_i, centre_j) >= (radius_i + radius_j) * (radius_i + radius_j))
lo = mid;
else
hi = mid;
}
return (lo + hi) / 2;
};
for(int i = 1;i < N;i++){
ld use = r[i];
for(int j = 0;j < i;j++){
use = min(use, Calc(i, j));
}
ans[i] = use;
cout << fixed << setprecision(3) << use << '\n';
}
return 0;
}
