Submission #22,361

2026-01-14 22:06:00

cpp17

Accepted 40/40

1ms

332 KiB

#include <bits/stdc++.h>
using namespace std;

int main() {
	int n; cin >> n;
	vector<vector<int>> dp(n+2, vector<int>(3,0));
	dp[0][0] = 1;
	for(int i = 0; i < n; i++) {
		dp[i+1][0] += dp[i][0];
		dp[i+2][0] += dp[i][0];
		dp[i+2][1] += dp[i][0];
		dp[i+2][2] += dp[i][0];

		dp[i+1][1] += dp[i][1];
		dp[i+1][2] += dp[i][2];
		dp[i+1][0] += dp[i][2] + dp[i][1];
	}
	cout << dp[n][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	1ms	316 KiB
		7	Accepted	2/2	1ms	316 KiB
		8	Accepted	3/3	1ms	316 KiB
		9	Accepted	3/3	1ms	316 KiB
		10	Accepted	3/3	1ms	316 KiB
		11	Accepted	3/3	1ms	316 KiB
		12	Accepted	3/3	1ms	332 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