Submission #669085

#	Time	Username	Problem	Language	Result	Execution time	Memory
669085		kirakaminski968	Balloons (CEOI11_bal)	C++17	100 / 100	655 ms	6976 KiB

bal

#include <bits/stdc++.h>
using namespace std;
double calc(pair<double,double> a,double bx){
    return (a.first-bx)*(a.first-bx)/(4*a.second);
}
int n;
int main()
{
    cin >> n;
    vector<double> answer(n);
    stack<pair<double,double>> s;
    for(int i = 0;i<n;i++){
        double x,r;
        cin >> x >> r;
        double ans = r;
        while(!s.empty()){
            pair<double,double> cur = s.top();
            ans = min(ans,calc(cur,x));
            if(ans >= cur.second){
                s.pop();
                continue;
            }
            break;
        }
        s.push(make_pair(x,ans));
        answer[i] = ans;
    }
    cout << fixed << setprecision(3);
    for(int i = 0;i<n;i++){
        cout << answer[i] << endl;
    }
    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