Submission #1251789

#	Time	Username	Problem	Language	Result	Execution time	Memory
1251789		XXBabaProBerkay	Watching (JOI13_watching)	C++20	0 / 100	4 ms	328 KiB

watching

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

#define F first
#define S second
#define MP make_pair
#define PB push_back

using ll = long long;
using ld = long double;
using pi = pair<int, int>;
using pll = pair<ll, ll>;

template<typename T>
using vec = vector<T>;

template<typename T, int N>
using arr = array<T, N>;

ll gcd(ll a, ll b) { return b == 0 ? a : gcd(b, a % b); }
ll lcm(ll a, ll b) { return a * b / gcd(a, b); } const int INF = 1e9 + 7;

int main()
{
	cin.tie(0) -> sync_with_stdio(0);

	int N, P, Q;
	cin >> N >> P >> Q;
	vec<int> A(N + 1);
	for (int i = 1; i <= N; i++)
		cin >> A[i];

	sort(A.begin() + 1, A.end());

	auto f = [&](int w)
	{
		int p = P, q = Q;
		for (int i = 1; i <= N; )
		{
			if (i > N) break;
			else if (p && !q || p && lower_bound(A.begin() + 1, A.end(), A[i] + w) == lower_bound(A.begin() + 1, A.end(), A[i] + 2 * w))
			{
				p--;
				i = lower_bound(A.begin() + 1, A.end(), A[i] + w) - A.begin();
			}
			else if (q)
			{
				q--;
				i = lower_bound(A.begin() + 1, A.end(), A[i] + 2 * w) - A.begin();
			}
			else if (i <= N)
				return 0;
		}
		return 1;
	};

	int l = 1, r = 1e9;
	while (l <= r)
	{
		int m = (l + r) / 2;

		if (f(m)) r = m - 1;
		else l = m + 1;
	}

	cout << l << '\n';
}

• Subtask 1: 0 / 50
• Subtask 2: 0 / 50