Submission #20,747

20747

2026-01-08 18:35:02

cpp17

Accepted 40/40

1ms

572 KiB

#include <iostream>

using namespace std;

int main()
{
	long long sols[29];
	int n;
	cin >> n;
	sols[0] = 1;
	sols[1] = 1;
	sols[2] = 2;
	for (int i = 3; i <= n; i++)
	{
		sols[i] = sols[i - 1] + sols[i - 2];
		long long rem = 0;
		for (int j = 0; j < i - 2; j++)
		{
			rem += sols[j];
		}
		rem *= 2;
		sols[i] += rem;
	}
	cout << sols[n];
}

	Sum	Test	Verdict		Time	Memory
base	40/40
		1	Accepted	0/0	1ms	508 KiB
		2	Accepted	0/0	1ms	316 KiB
		3	Accepted	2/2	1ms	316 KiB
		4	Accepted	2/2	1ms	316 KiB
		5	Accepted	2/2	1ms	316 KiB
		6	Accepted	2/2	1ms	572 KiB
		7	Accepted	2/2	1ms	508 KiB
		8	Accepted	3/3	1ms	332 KiB
		9	Accepted	3/3	1ms	316 KiB
		10	Accepted	3/3	1ms	316 KiB
		11	Accepted	3/3	1ms	316 KiB
		12	Accepted	3/3	1ms	316 KiB
		13	Accepted	3/3	1ms	316 KiB
		14	Accepted	3/3	1ms	316 KiB
		15	Accepted	3/3	1ms	384 KiB
		16	Accepted	3/3	1ms	508 KiB
		17	Accepted	3/3	1ms	316 KiB