Submission #956311

#	Time	Username	Problem	Language	Result	Execution time	Memory
956311		codefox	Balloons (CEOI11_bal)	C++14	100 / 100	446 ms	5528 KiB

bal

#include<bits/stdc++.h>

using namespace std;

#define pii pair<int, double>
#define ll long long

int main()
{
    //freopen("input.txt", "r", stdin);
    //freopen("output.txt", "w", stdout);

    cout << fixed;
    cout << setprecision(3);

    int n;
    cin >> n;
    stack<pii> balloons;
    for (int i = 0; i < n; i++)
    {
        int a, b;
        cin >> a >> b;
        double sol = b;
        while (balloons.size())
        {
            ll dn = a-balloons.top().first;
            double r = balloons.top().second;
            if ((r+b)*(r+b) >= dn*dn+(r-b)*(r-b)) 
            {
                sol = min(sol, (dn*dn)/(4*r));
            }
            if (r>sol)break;
            balloons.pop();
        }
        balloons.push({a, sol});
        cout << sol << "\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