Submission #1183800

#	Time	Username	Problem	Language	Result	Execution time	Memory
1183800		aminjon__	Balloons (CEOI11_bal)	C++17	100 / 100	127 ms	3496 KiB

bal

#include <bits/stdc++.h>
#define all(x) (x).begin(), (x).end()
#define endl '\n'
typedef unsigned int uint;
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
using namespace std;

signed main()
{
    ios_base::sync_with_stdio(NULL);
    cin.tie(NULL);
    cout.tie(NULL);
    ll n, x2;
    ld r2;
    cin >> n;
    stack<pair<ll, ld>> s;
    cout << fixed << setprecision(10);
    for (int i = 1; i <= n; i++)
    {
        cin >> x2 >> r2;
        while (!s.empty())
        {
            auto [x1, r1] = s.top();
            ll val = (x1 - x2) * (x1 - x2);
            ld val2 = val / (4.0 * r1);
            r2 = min(r2, val2);
            if (r2 < r1)
            {
                break;
            }
            s.pop();
        }
        cout << r2 << endl;
        s.push({x2, r2});
    }
    return 0;
}

• 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