Submission #5,600

2023-08-02 13:32:53

cpp17

Accepted 80/80

14ms

19044 KiB

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int MOD = 20210108;

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

	Sum	Test	Verdict		Time	Memory
base	80/80
		1	Accepted	0/0	3ms	1844 KiB
		2	Accepted	0/0	3ms	2108 KiB
		3	Accepted	4/4	3ms	2312 KiB
		4	Accepted	4/4	3ms	2484 KiB
		5	Accepted	5/5	3ms	2704 KiB
		6	Accepted	5/5	3ms	3036 KiB
		7	Accepted	6/6	14ms	18500 KiB
		8	Accepted	6/6	4ms	4812 KiB
		9	Accepted	7/7	3ms	3112 KiB
		10	Accepted	7/7	3ms	3336 KiB
		11	Accepted	8/8	4ms	6616 KiB
		12	Accepted	8/8	13ms	19044 KiB
		13	Accepted	8/8	13ms	17512 KiB
		14	Accepted	8/8	7ms	9168 KiB
		15	Accepted	2/2	3ms	4192 KiB
		16	Accepted	2/2	3ms	4308 KiB