Submission #845846

#	Time	Username	Problem	Language	Result	Execution time	Memory
845846		BidoTeima	Balloons (CEOI11_bal)	C++17	100 / 100	152 ms	5500 KiB

bal

#include <bits/stdc++.h>
using namespace std;
typedef long double ld;

ld get_rad(ld x1, ld r1, ld x2){
    return (x2 - x1) * (x2 - x1) / (4 * r1);
}

int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int n;
    cin>>n; 
    stack<pair<int,ld>>st;
    for(int i = 0; i < n; i++){
        int x2; 
        ld r;
        cin>>x2>>r;
        while(st.size()){
            int x1 = st.top().first;
            ld r1 = st.top().second; 
            r=min(r,get_rad(x1,r1,x2));
            if(r>=r1)st.pop();
            else{
                cout<<fixed<<setprecision(3)<<r<<'\n';
                st.push({x2,r});
                break;
            }
        }
        if(st.empty()){
            cout<<fixed<<setprecision(3)<<r<<'\n';
            st.push({x2,r});
        }
    }
    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