Submission #657007

#	Time	Username	Problem	Language	Result	Execution time	Memory
657007		Nafeeszx	Balloons (CEOI11_bal)	C++14	100 / 100	187 ms	10136 KiB

bal

#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
using namespace std;
#define trav(a, x) for(auto& a : x)
#define FOR(i, a, b) for (int i=(a); i<=(signed)(b); i++)
#define ROF(i, a, b) for (int i=(a); i>=(signed)(b); i--)
#define F0R(i, a) for (int i=0; i<(signed)(a); i++)
#define vi vector<int>
#define all(v) (v).begin(), (v).end()
#define f first
#define s second
typedef long long ll;

const int mod = 1e9 + 7, MOD = 998244353;

int main()
{	
    ios_base::sync_with_stdio(0); cin.tie(0);
    int n; cin >> n;
    vector<pair<double, double>> v(n);
    stack<pair<double, double>> rad;
    vector<double> res(n);
    F0R(i, n) {
        cin >> v[i].first >> v[i].second;
    }
    F0R(i, n) {
        
        double ans = v[i].second;
            
        while(!rad.empty()) {
            ans = min(ans, ((rad.top().first - v[i].first)*(rad.top().first - v[i].first))/(4*rad.top().second));           
            if(ans >= rad.top().second) rad.pop();
            else break;
        } 
                    
        res[i] = min(ans, v[i].second);
        rad.push({v[i].first, res[i]});
    
    }
    F0R(i, n) {
        cout << fixed << setprecision(3) << res[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