Submission #21,794

2026-01-14 07:55:25

cpp17

Accepted 40/40

1ms

508 KiB

#include <iostream>

using namespace std;

int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int n;
    cin>>n;
    int t[n+4];
    int v[n+4];
    t[0]=1;
    t[1]=2;
    t[2]=5;
    v[0]=0;
    v[1]=1;
    v[2]=2;
    for(int i=3;i<n+4;i++)
    {
        v[i]=v[i-1]+t[i-2];
        t[i]=t[i-1]+t[i-2]+2*v[i-1];
    }
    cout << t[n-1];
    return 0;
}

	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	316 KiB
		8	Accepted	3/3	1ms	368 KiB
		9	Accepted	3/3	1ms	508 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	508 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