Submission #590232

#	Time	Username	Problem	Language	Result	Execution time	Memory
590232		Minhho	Balloons (CEOI11_bal)	C++17	100 / 100	210 ms	14852 KiB

bal

#define taskname "1"
#include<bits/stdc++.h>
#define db long double

using namespace std;
const int maxn = 2e5 + 10;
const db eps = 1e-9;
int n;
db ans[maxn], x[maxn], r[maxn];

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr); cout.tie(nullptr);
    cin>>n;
    stack<int> st;
    for (int i=1; i<=n; i++)
    {
        cin>>x[i]>>r[i];
        while (!st.empty())
        {
            db x1 = x[st.top()], r1 = ans[st.top()];
            r[i] = min(r[i], (x[i]-x1)*(x[i]-x1)/(4.0*r1));
            if (r[i] >= r1) st.pop();
            else break;
        }
        ans[i] = r[i];
        st.emplace(i);
    }
    for (int i=1; i<=n; i++) cout<<setprecision(3)<<fixed<<ans[i]<<"\n";
}
/**
3
0 9
8 1
13 7
**/

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10