Submission #1095905

#	Time	Username	Problem	Language	Result	Execution time	Memory
1095905		dpsaveslives	Balloons (CEOI11_bal)	C++17	100 / 100	140 ms	6992 KiB

bal

#include <bits/stdc++.h>
#define ff first
#define ss second
using namespace std;

int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    stack<pair<double,double>> st;
    int N; cin >> N;
    vector<double> ans(N);
    for(int i = 0;i<N;++i){
        double x,r; cin >> x >> r;
        double res = r;
        while(!st.empty()){
            double bx = st.top().ff, rx = st.top().ss;
            double tmp = (x-bx)*(x-bx)/(4*rx);
            res = min(res,tmp);
            if(res >= rx){
                st.pop();
                continue;
            }
            break;
        }
        ans[i] = res;
        st.push({x,res});
    }
    cout << fixed << setprecision(3);
    for(int i = 0;i<N;++i){
        cout << ans[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