Submission #1288713

#	Time	Username	Problem	Language	Result	Execution time	Memory
1288713		torment	Balloons (CEOI11_bal)	C++20	20 / 100	103 ms	8124 KiB

bal

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

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n;
    cin >> n;
    vector<long double>x(n), r(n);
    for(int i = 0;i < n;++i){
        cin >> x[i] >> r[i];
    }
    long double k = 0, b = 1e9;
    for(int i = 0;i < n;++i){
        long double mn = 1e9;
        mn = min(mn, k * x[i] + b);
        if(i){
            long double nk = 1.0 / (2 * sqrtl(r[i - 1])), nb = -x[i - 1] / (2 * sqrtl(r[i - 1]));
            if(mn > nk * x[i] + nb){
                mn = nk * x[i] + nb;
                k = nk;
                b = nb;
            }
        }
        mn = min(mn, sqrtl(r[i]));
        mn = mn * mn;
        cout << fixed << setprecision(3) << mn << '\n';
        r[i] = mn;
    }
}

• Subtask 1: 10 / 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