Submission #202944

#	Time	Username	Problem	Language	Result	Execution time	Memory
202944		Neklixx	Balloons (CEOI11_bal)	C++14	40 / 100	2067 ms	7860 KiB

bal

#include <bits/stdc++.h>
#define pb push_back
#define mp make_pair
#define F first
#define S second
#define all(v) v.begin(), v.end()
#define sh cin.tie(0); cin.sync_with_stdio(0); cout.tie(0);
#define FILE freopen("test.in", "r", stdin);
#define vprint(v) for (int ii = 0; ii < v.size(); ii++){cout << v[ii] << " ";}
#define debugv(v) if (v.size() != 0) {cout << "[ "; for (int __ = 0; __ < (int)(v.size()) - 1; __++){cout << v[__] << ", ";} cout << v[(int)(v.size()) - 1] << " ]" << endl;} else {cout << "[]" << endl;}
#define debug cout << "-----------------------------------------------" << endl;
#define print1(a) cout << "{ " << a << " }" << endl;
#define print2(a, b) cout << "{ " << a << ", " << b << " }" << endl;
#define print3(a, b, c) cout << "{ " << a << ", " << b << ", " << c << " }" << endl;
#define print4(a, b, c, d) cout << "{ " << a << ", " << b << ", " << c << ", " << d << " }" << endl;
using namespace std;
#define int long long
const double INF = 1e11 + 228;
const int MAXN = 2e5 + 228;
double ans[MAXN];
signed main()
{
#ifdef LOCAL
    FILE;
#endif
    sh;
	int n;
	cin >> n;
	vector<pair<int, int>> v;
	for (int i = 0; i < n; i++) {
		int aa, bb;
		cin >> aa >> bb;
		v.pb({aa, bb});
	}    

	vector<pair<double, double>> s;

	for (int i = 0; i < n; i++) {
		double now = v[i].S;
		for (auto to : s) {
			double cl = (to.S * to.S) / (4 * to.F) + (v[i].F * v[i].F) / (4 * to.F) - (2 * v[i].F * to.S) / (4 * to.F);
			now = min(now, cl);
		}
		while (s.size() > 0 && s.back().F <= now) {
			s.pop_back();
		}
		ans[i] = now;
		s.pb({now, (double)v[i].F});
	}

	for (int i = 0; i < n; i++) {
		cout << fixed << setprecision(4) << ans[i] << '\n';
	}
    return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10