Submission #737090

#	Time	Username	Problem	Language	Result	Execution time	Memory
737090		study	Balloons (CEOI11_bal)	C++17	100 / 100	166 ms	10220 KiB

bal

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

struct Bal{
    int x;
    double max_r;
};

const int N = 2e5, inf = 1e18;

Bal bals[N];

double calc_rayon(Bal a, Bal b){
    double dist = a.x-b.x;
    return dist*dist/4.0/a.max_r;
}

int32_t main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
    cout.precision(3);
    cout << fixed;
    int n;
    cin >> n;
    for (int i=0; i<n; ++i){
        cin >> bals[i].x >> bals[i].max_r;
    }
    stack<Bal> st;
    for (int i=0; i<n; ++i){
        double crt_ans = bals[i].max_r;
        while (!st.empty()){
            Bal f = st.top();
            crt_ans = min(crt_ans,calc_rayon(f,bals[i]));
            if (crt_ans > f.max_r) st.pop();
            else break;
        }
        st.push({bals[i].x,crt_ans});
        cout << crt_ans << '\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