Submission #1236365

#	Time	Username	Problem	Language	Result	Execution time	Memory
1236365		dhuyyyy	Balloons (CEOI11_bal)	C++20	100 / 100	134 ms	8548 KiB

bal

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

using ll = long long;
using ii = pair<ll, ll>;
using pii = pair<int,ii>;
using aa = array<int,3>;

const int N = 2e5+5;
const int INF = 1e9;
const int MOD = 1e9+7;

int n;
pair<long double,long double> p[N];
stack<int> st;
signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);
    cin >> n;
    for (int i = 1; i <= n; i++){
        cin >> p[i].fi >> p[i].se;
        while (!st.empty()){
            int pos = st.top();
            long double ans = (p[i].fi - p[pos].fi) * (p[i].fi - p[pos].fi) / (4LL * p[pos].se);
            p[i].se = min(p[i].se,ans);
            if (p[i].se >= p[pos].se) st.pop();
            else break;
        }
        st.push(i);
        cout << fixed << ' ' << setprecision(3) << ' ' << p[i].se << '\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