Submission #22,209

2026-01-14 17:52:25

cpp17

Accepted 40/40

3ms

512 KiB

// UUID: 9aa3f9dc-6640-4e70-893f-3fdf4f6247d3
#include <bits/stdc++.h>
using namespace std;

int main() {
	long long n; cin >> n;
    vector<long long> dp(n+1);
	dp[1] = 1;
	dp[2] = 2;
	for (long long i = 3; i <= n; i++) {
		long long sum = dp[i-1] + dp[i-2];
		for (long long j = 1; j < i-2; j++) {
			sum += dp[j] * 2;
		}
		sum += 2;
		dp[i] = sum;
	}

	cout << dp[n];
}

	Sum	Test	Verdict		Time	Memory
base	40/40
		1	Accepted	0/0	1ms	316 KiB
		2	Accepted	0/0	1ms	324 KiB
		3	Accepted	2/2	2ms	512 KiB
		4	Accepted	2/2	1ms	316 KiB
		5	Accepted	2/2	2ms	384 KiB
		6	Accepted	2/2	1ms	316 KiB
		7	Accepted	2/2	1ms	344 KiB
		8	Accepted	3/3	1ms	316 KiB
		9	Accepted	3/3	1ms	316 KiB
		10	Accepted	3/3	2ms	384 KiB
		11	Accepted	3/3	2ms	316 KiB
		12	Accepted	3/3	1ms	316 KiB
		13	Accepted	3/3	1ms	316 KiB
		14	Accepted	3/3	3ms	316 KiB
		15	Accepted	3/3	2ms	316 KiB
		16	Accepted	3/3	2ms	316 KiB
		17	Accepted	3/3	1ms	332 KiB