Submission #1266731

#	Time	Username	Problem	Language	Result	Execution time	Memory
1266731		bach25089	Balloons (CEOI11_bal)	C++20	100 / 100	111 ms	8248 KiB

bal

#include <bits/stdc++.h>
using namespace std;
long double x[200005], r[200005];

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    int n;
    cin >> n;
    for (int i = 0; i < n; i++)
    {
        cin >> x[i] >> r[i];
    }
    stack<int> st;
    st.push(0);
    for (int i = 1; i < n; i++)
    {
        while (!st.empty())
        {
            int j = st.top();
            long double mk = (x[i] - x[j]) * (x[i] - x[j]) / (4.0L * r[j]);
            if (mk < r[i])
            {
                r[i] = mk;
            }
            if (r[i] <= r[j])
            {
                break;
            }
            else
            {
                st.pop();
            }
        }
        st.push(i);
    }
    for (int i = 0; i < n; i++)
    {
        cout << fixed << setprecision(3) << r[i] << "\n";
    }
}

• 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