Submission #15,415

2025-02-19 12:44:49

cpp17

Accepted 50/50

9ms

4164 KiB

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

int main() {
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	int n; cin >> n;
    int dp[n+1];
    dp[0] = 0;
    dp[1] = 2;
    dp[2] = 4;
    dp[3] = 10;
    for(int i = 4; i <= n; i++){
        dp[i] = (dp[i-1] * 2 + dp[i-3] * 2) % MOD;
    }
    cout << dp[n];
}

	Sum	Test	Verdict		Time	Memory
base	50/50
		1	Accepted	0/0	1ms	508 KiB
		2	Accepted	0/0	1ms	316 KiB
		3	Accepted	3/3	1ms	524 KiB
		4	Accepted	3/3	1ms	316 KiB
		5	Accepted	4/4	1ms	316 KiB
		6	Accepted	4/4	1ms	316 KiB
		7	Accepted	4/4	9ms	4120 KiB
		8	Accepted	4/4	2ms	820 KiB
		9	Accepted	4/4	1ms	508 KiB
		10	Accepted	4/4	1ms	316 KiB
		11	Accepted	4/4	3ms	1076 KiB
		12	Accepted	4/4	9ms	4164 KiB
		13	Accepted	4/4	8ms	3636 KiB
		14	Accepted	4/4	4ms	1588 KiB
		15	Accepted	2/2	1ms	508 KiB
		16	Accepted	2/2	1ms	316 KiB