Submission #590387

#	Time	Username	Problem	Language	Result	Execution time	Memory
590387		tutis	Uplifting Excursion (BOI22_vault)	C++17	20 / 100	5051 ms	4208 KiB

vault

/*input
2 5
2 3 1 1 4
*/
#pragma GCC optimize ("O3")
#pragma GCC target("avx,avx2,fma")
#include <bits/stdc++.h>
using namespace std;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
using ll = long long;
using ull = unsigned long long;
using ld = long double;
int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	int M;
	ll L;
	cin >> M >> L;
	ll A[2 * M + 1];
	for (int i = 0; i <= 2 * M; i++)
		cin >> A[i];
	int D = 505500;
	vector<int> C(2 * D + 1, -1e9);
	C[D] = 0;
	int del = 0;
	for (int i = 1; i <= M; i++)
	{
		for (int k = 1; k <= A[i + M]; k++)
		{
			for (int j = min(D + del, 2 * D - i); j >= max(0, D - del); j--)
			{
				C[j + i] = max(C[j + i], C[j] + 1);
			}
			del += i;
		}
		for (int k = 1; k <= A[-i + M]; k++)
		{
			for (int j = max(D - del, i); j <= min(D + del, 2 * D); j++)
			{
				C[j - i] = max(C[j - i], C[j] + 1);
			}
			if (k > A[i + M])
				del += i;
		}
	}
	if (L + D >= 0 && L + D <= 2 * D && C[L + D] >= 0)
		cout << C[L + D] + A[M] << "\n";
	else
		cout << "impossible\n";
}

• Subtask 1: 5 / 5
• Subtask 2: 15 / 15
• Subtask 3-1: 0 / 10
• Subtask 3-2: 0 / 10
• Subtask 4-1: 0 / 10
• Subtask 4-2: 0 / 10
• Subtask 5-1: 0 / 10
• Subtask 5-2: 0 / 10
• Subtask 6-1: 0 / 10
• Subtask 6-2: 0 / 10