Submission #25,293

2026-02-19 02:01:37

cpp17

Accepted 40/40

3ms

1844 KiB

// Source: https://usaco.guide/general/io

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

const int MOD=20210108;

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

	Sum	Test	Verdict		Time	Memory
base	40/40
		1	Accepted	0/0	1ms	316 KiB
		2	Accepted	0/0	1ms	316 KiB
		3	Accepted	2/2	1ms	500 KiB
		4	Accepted	2/2	1ms	316 KiB
		5	Accepted	3/3	1ms	316 KiB
		6	Accepted	3/3	1ms	316 KiB
		7	Accepted	3/3	3ms	1844 KiB
		8	Accepted	3/3	2ms	1332 KiB
		9	Accepted	3/3	1ms	316 KiB
		10	Accepted	3/3	1ms	316 KiB
		11	Accepted	3/3	3ms	1844 KiB
		12	Accepted	3/3	3ms	1844 KiB
		13	Accepted	4/4	3ms	1588 KiB
		14	Accepted	4/4	2ms	1332 KiB
		15	Accepted	2/2	1ms	316 KiB
		16	Accepted	2/2	1ms	316 KiB