Submission #20,744

20744

2026-01-08 18:32:59

cpp17

Accepted 40/40

2ms

556 KiB

#include <iostream>
#include <vector>

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];

    return 0;
}

	Sum	Test	Verdict		Time	Memory
base	40/40
		1	Accepted	0/0	1ms	316 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	2ms	500 KiB
		7	Accepted	2/2	2ms	316 KiB
		8	Accepted	3/3	1ms	324 KiB
		9	Accepted	3/3	1ms	316 KiB
		10	Accepted	3/3	1ms	316 KiB
		11	Accepted	3/3	1ms	556 KiB
		12	Accepted	3/3	1ms	316 KiB
		13	Accepted	3/3	1ms	332 KiB
		14	Accepted	3/3	1ms	316 KiB
		15	Accepted	3/3	1ms	316 KiB
		16	Accepted	3/3	1ms	500 KiB
		17	Accepted	3/3	1ms	316 KiB