이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <bits/stdc++.h>
using namespace std;
#define sqr(x) (x)*(x)
const double eps=1e-3;
const int N=2e5+10;
stack<int> st;
double ans[N],x[N],R[N];
int n;
signed main()
{
ios::sync_with_stdio(NULL);
cin.tie(nullptr);
cout.precision(3);
cout<<fixed;
cin>>n;
for(int i=0;i<n;++i)cin>>x[i]>>R[i],ans[i]=R[i];
st.push(0);
for(int i=1;i<n;++i){
while(!st.empty()){
ans[i]=min(ans[i],sqr(x[i]-x[st.top()])/(4.*ans[st.top()]));
if(ans[i]-ans[st.top()]>=eps)st.pop();
else break;
}
st.push(i);
}
for(int i=0;i<n;++i)cout<<ans[i]<<'\n';
}
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