Submission #19,538

19538

2025-12-14 11:59:56

cpp17

Accepted 80/80

14ms

8244 KiB

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

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

	Sum	Test	Verdict		Time	Memory
base	80/80
		1	Accepted	0/0	1ms	316 KiB
		2	Accepted	0/0	1ms	316 KiB
		3	Accepted	4/4	1ms	500 KiB
		4	Accepted	4/4	1ms	316 KiB
		5	Accepted	5/5	1ms	316 KiB
		6	Accepted	5/5	1ms	316 KiB
		7	Accepted	6/6	14ms	8244 KiB
		8	Accepted	6/6	2ms	1332 KiB
		9	Accepted	7/7	1ms	316 KiB
		10	Accepted	7/7	1ms	316 KiB
		11	Accepted	8/8	4ms	1896 KiB
		12	Accepted	8/8	14ms	8148 KiB
		13	Accepted	8/8	10ms	7220 KiB
		14	Accepted	8/8	4ms	2868 KiB
		15	Accepted	2/2	1ms	508 KiB
		16	Accepted	2/2	1ms	316 KiB