Submission #17,679

2025-09-13 09:53:39

cpp17

Accepted 40/40

1ms

508 KiB

#include <bits/stdc++.h>
using namespace std;
int main() {
    int n; cin >> n;
    vector<array<long long,2>> dp(n+5);
    dp[0][0] = dp[0][1] = 1;
    dp[1][0] = dp[1][1] = 1;
    dp[2][0] = dp[2][1] = 2;
    for (int i = 3; i <= n; i++) {
        dp[i][0] = dp[i-1][0]+dp[i-2][0]+dp[i-2][1]*2;
        dp[i][1] = dp[i-1][0]+dp[i-1][1];
    }
    cout << dp[n][0] << '\n';
}

	Sum	Test	Verdict		Time	Memory
base	40/40
		1	Accepted	0/0	1ms	316 KiB
		2	Accepted	0/0	1ms	496 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	508 KiB
		8	Accepted	3/3	1ms	316 KiB
		9	Accepted	3/3	1ms	316 KiB
		10	Accepted	3/3	1ms	500 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