Submission #21,707

2026-01-13 18:16:08

cpp17

Accepted 40/40

2ms

508 KiB

// UUID: 5e72f9e2-511d-4329-8363-355d1881de08
#include <bits/stdc++.h>
using namespace std;
using ll = long long;

int main() {
	ll n;
    cin >> n;
    vector <ll> a(n+1);
    vector <ll> jf(n+1), ja(n+1);
    a[1] = 1, a[2] = 2;
    ja[1] = 0, ja[2] = 1, jf[1] = 0, jf[2] = 1;
    for ( ll i = 3; i <= n; i++ ){
        a[i] = a[i-1] + a[i-2] + ja[i-1] + jf[i-1];
        ja[i] = a[i-2] + jf[i-1];
        jf[i] = a[i-2] + ja[i-1];
    } 
    cout << a[n] << "\n";
}

	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	508 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	316 KiB
		8	Accepted	3/3	1ms	316 KiB
		9	Accepted	3/3	2ms	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	316 KiB
		16	Accepted	3/3	1ms	316 KiB
		17	Accepted	3/3	1ms	316 KiB