Submission #20,768

2026-01-08 19:35:16

python3

Accepted 40/40

17ms

3088 KiB


n = int(input())
sol = [0] * 29
sol[1] = 1
sol[2] = 2
sol[3] = 5
for i in range(4, n+1):
    sol[i] = 2*sol[i-1] + sol[i-3]
print(sol[n])

	Sum	Test	Verdict		Time	Memory
base	40/40
		1	Accepted	0/0	17ms	2868 KiB
		2	Accepted	0/0	17ms	2872 KiB
		3	Accepted	2/2	16ms	3032 KiB
		4	Accepted	2/2	16ms	2864 KiB
		5	Accepted	2/2	16ms	3088 KiB
		6	Accepted	2/2	16ms	2972 KiB
		7	Accepted	2/2	16ms	3056 KiB
		8	Accepted	3/3	16ms	2876 KiB
		9	Accepted	3/3	17ms	2872 KiB
		10	Accepted	3/3	16ms	3088 KiB
		11	Accepted	3/3	16ms	2880 KiB
		12	Accepted	3/3	16ms	2884 KiB
		13	Accepted	3/3	16ms	2868 KiB
		14	Accepted	3/3	16ms	3052 KiB
		15	Accepted	3/3	16ms	3048 KiB
		16	Accepted	3/3	16ms	3044 KiB
		17	Accepted	3/3	17ms	2868 KiB