Submission #1340648

#	Time	Username	Problem	Language	Result	Execution time	Memory
1340648		Nipphitch	Balloons (CEOI11_bal)	C++20	100 / 100	131 ms	3428 KiB

bal

#include <bits/stdc++.h>
using namespace std;

int n;
stack <pair <double,double>> st;

double cal(double x,double R){
    return (x*x)/(4*R);
}

signed main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cin >> n;
    for(int i=1;i<=n;i++){
        double p,r;
        cin >> p >> r;
        while(!st.empty()){
            auto [x,R]=st.top();
            r=min(r,cal(p-x,R));
            if(r>=R) st.pop();
            else break;
        }
        st.push({p,r});
        cout << fixed << setprecision(10) << r << "\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