Submission #1285702

#	Time	Username	Problem	Language	Result	Execution time	Memory
1285702		thanhliem40	Balloons (CEOI11_bal)	C++20	100 / 100	196 ms	7120 KiB

bal

#include <bits/stdc++.h>

using namespace std;

const long double eps = 1e-9;

void sol() {
    int n; cin >> n;
    vector<pair<double, double>> v(n);
    for(int i = 0; i < n; i++) cin >> v[i].first >> v[i].second;
    
    vector<double> ans(n);
    auto radius = [&](int curr, pair<double, double> prev) -> double {
        double r = (v[curr].first - prev.first) * ((v[curr].first - prev.first)) / (4 * prev.second);
        return r;
    };
    stack<pair<double, double>> mono;
    for(int i = 0; i < n; i++){
        double R = v[i].second;
        while(!mono.empty()){
            pair<double, double> t = mono.top();
            double r = radius(i, t);
            R = min(R, r);
            if(R >= t.second){
                mono.pop();
                continue;
            }
            else break;
        }
        mono.push(make_pair(v[i].first, R));
        ans[i] = R;
    }

    for(auto el : ans){
        cout << fixed << setprecision(6) << el << ' ';
    }
}

int main() 
{
    //freopen("BALLOONS.INP","r",stdin);
    //freopen("BALLOONS.OUT","w",stdout);

    sol();
    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