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>
typedef long long ll;
typedef long double ld;
using namespace std;
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
typedef tree<pair<int,int>,null_type,less<pair<int,int>>,rb_tree_tag,
tree_order_statistics_node_update> indexed_set;
int main(){
ios_base::sync_with_stdio(false);
cin.tie(NULL);
int n;
cin>>n;
ld a[n];
ld r[n];
int p;
for(int i=0;i<n;i++){
cin>>a[i];
ld l;
cin>>l;
if(i==0){
r[i]=l;
}
else if(i==1){
r[i]=min(l,((a[i]-a[i-1])*(a[i]-a[i-1]))/(4*r[i-1]));
p=0;
}
else{
r[i]=min(l,((a[i]-a[i-1])*(a[i]-a[i-1]))/(4*r[i-1]));
r[i]=min(r[i],((a[i]-a[p])*(a[i]-a[p]))/(4*r[p]));
if(((a[i]-a[i-1])*(a[i]-a[i-1]))/(4*r[i-1])<((a[i]-a[p])*(a[i]-a[p]))/(4*r[p])){
p=i-1;
}
}
cout<<fixed<<setprecision(3)<<r[i]<<endl;
}
}
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