Submission #1011149

#	Time	Username	Problem	Language	Result	Execution time	Memory
1011149		vjudge1	Balloons (CEOI11_bal)	C++17	100 / 100	128 ms	7764 KiB

bal

#include <bits/stdc++.h>
using i64 = long long;

int main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);

    int n;
    std::cin >> n;
    
    std::vector<int> x(n);
    std::vector<double> r(n);
    for (int i = 0; i < n; i++) {
        std::cin >> x[i] >> r[i];
    }

    std::vector<std::tuple<int, double>> s;
    for (int i = 0; i < n; i++) {
        while (s.size()) {
            auto [x1, r1] = s.back();
            r[i] = std::min(r[i], 1.0 * (x[i] - x1) * (x[i] - x1) / 4 / r1);
            if (r[i] >= r1) {
                s.pop_back();
            } else {
                break;
            }
        }
        s.push_back({x[i], r[i]});
    }

    for (int i = 0; i < n; i++) {
        std::cout << std::fixed << std::setprecision(3) << r[i] << "\n";
    }

    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