Submission #25,525

2026-02-20 14:14:28

cpp17

Accepted 80/80

9ms

4292 KiB

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

int main() {
	long long n; cin >> n;
	vector<int> dp(n + 2);
	dp[0] = 1;
	dp[1] = 3;
	for (long long i = 2; i <= n; i++) {
		dp[i] = (3 * dp[i - 1] + dp[i - 2]) % 20210108;
	}
	cout << dp[n];
}

	Sum	Test	Verdict		Time	Memory
base	80/80
		1	Accepted	0/0	1ms	508 KiB
		2	Accepted	0/0	1ms	316 KiB
		3	Accepted	4/4	1ms	316 KiB
		4	Accepted	4/4	1ms	316 KiB
		5	Accepted	5/5	1ms	316 KiB
		6	Accepted	5/5	1ms	384 KiB
		7	Accepted	6/6	9ms	4292 KiB
		8	Accepted	6/6	2ms	788 KiB
		9	Accepted	7/7	1ms	316 KiB
		10	Accepted	7/7	1ms	500 KiB
		11	Accepted	8/8	3ms	1076 KiB
		12	Accepted	8/8	9ms	4072 KiB
		13	Accepted	8/8	8ms	3840 KiB
		14	Accepted	8/8	4ms	1588 KiB
		15	Accepted	2/2	1ms	356 KiB
		16	Accepted	2/2	1ms	316 KiB