제출 #699760

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
699760		tcmmichaelb139	Balloons (CEOI11_bal)	C++17	10 / 100	174 ms	11384 KiB

bal

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

long double dist(pair<long long, long long> a, pair<long long, long long> b) {
    return (a.first - b.first) * (a.first - b.first) / (long double)(4 * b.second);
}

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

    cout << fixed << setprecision(3);

    int n;
    cin >> n;
    vector<pair<long long, long double>> v(n);
    for (int i = 0; i < n; i++)
        cin >> v[i].first >> v[i].second;

    vector<long double> ans(n, 1e9);
    stack<pair<long long, long double>> s;
    for (int i = 0; i < n; i++) {
        if (s.size() == 0) {
            s.push(v[i]);
            ans[i] = v[i].second;
        } else {
            ans[i] = min((long double)v[i].second, dist(v[i], s.top()));
            while (s.size() > 1 && s.top().second < ans[i]) {
                s.pop();
                ans[i] = min(ans[i], dist(v[i], s.top()));
            }
            s.push({v[i].first, ans[i]});
        }
    }
    for (auto i : ans)
        cout << i << '\n';
}

• Subtask 1: 0 / 10
• Subtask 2: 10 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10