Submission #22,208

2026-01-14 17:50:49

cpp17

Accepted 40/40

1ms

508 KiB

// UUID: cab6ad62-a379-49e5-ac90-b41a1ff4e730
#include <bits/stdc++.h>
using namespace std;

int main() {
	int N; cin>>N;
	vector<long long>dp(max(N+1, 3), 0);
	dp[0]=1;
	dp[1]=1;
	dp[2]=2;
	for(int i=3; i<=N; i++)
	{
		dp[i]+=dp[i-1]+dp[i-2];
		for(int j=i-3; j>=0; j--)
		{
			dp[i]+=2*dp[j];
		}
	}
	cout<<dp[N];
}

	Sum	Test	Verdict		Time	Memory
base	40/40
		1	Accepted	0/0	1ms	316 KiB
		2	Accepted	0/0	1ms	500 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	316 KiB
		7	Accepted	2/2	1ms	508 KiB
		8	Accepted	3/3	1ms	316 KiB
		9	Accepted	3/3	1ms	316 KiB
		10	Accepted	3/3	1ms	316 KiB
		11	Accepted	3/3	1ms	332 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	316 KiB
		16	Accepted	3/3	1ms	316 KiB
		17	Accepted	3/3	1ms	316 KiB