Submission #921184

#	Time	Username	Problem	Language	Result	Execution time	Memory
921184		0x34c	Balloons (CEOI11_bal)	C++17	100 / 100	160 ms	5716 KiB

bal

#include <bits/stdc++.h>
#define ll long long
#define pii pair<int, int>
#define pdd pair<double, double>
#define endl '\n'

using namespace std;

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

    int N;
    cin >> N;

    auto calc_r = [](pdd &a, double x) {
        return ((x - a.first)*(x - a.first))/(4*a.second);
    };

    stack<pdd> st;
    for(int i = 0; i < N; i++) {
        double x, r;
        cin >> x >> r;

        double max_r = r;
        while(!st.empty()) {
            pdd tp = st.top();

            max_r = min(max_r, calc_r(tp, x));
            if(max_r >= tp.second)
                st.pop();
            else break;
        }
        st.push({x, max_r});
        cout << fixed << setprecision(4) << max_r << endl;
    }
}

• 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