Submission #20,753

20753

2026-01-08 19:04:02

cpp17

Accepted 40/40

2ms

508 KiB

#include <bits/stdc++.h>

using namespace std;

int main()
{
	int n;
	cin>>n;
	vector<int>v(n+1);
	v[1]=1;
	v[2]=2;
	v[3]=5;
	for(int i=4; i<=n; i++)
    {
        v[i]=2*v[i-1]+v[i-3];
    }
    cout<<v[n];
}

	Sum	Test	Verdict		Time	Memory
base	40/40
		1	Accepted	0/0	1ms	316 KiB
		2	Accepted	0/0	1ms	508 KiB
		3	Accepted	2/2	1ms	316 KiB
		4	Accepted	2/2	1ms	316 KiB
		5	Accepted	2/2	1ms	500 KiB
		6	Accepted	2/2	1ms	316 KiB
		7	Accepted	2/2	1ms	316 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	316 KiB
		12	Accepted	3/3	2ms	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