Submission #11,502

2024-10-14 11:18:23

cpp17

Accepted 50/50

16ms

4152 KiB

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

#include <bits/stdc++.h>
using namespace std;
const int MOD=20210108;
int main() {
	int n; cin>>n;
	vector<int> dp(n+1);
	dp[0]=1;
	for(int i=1; i<=n; i++)
	{
		dp[i]=(dp[i-1]*2)%MOD;
		if(i>2) dp[i]=((dp[i-3])*2%MOD+dp[i])%MOD;
	}
	cout<<dp[n]<<"\n";
}

	Sum	Test	Verdict		Time	Memory
base	50/50
		1	Accepted	0/0	1ms	320 KiB
		2	Accepted	0/0	1ms	320 KiB
		3	Accepted	3/3	1ms	320 KiB
		4	Accepted	3/3	1ms	320 KiB
		5	Accepted	4/4	1ms	320 KiB
		6	Accepted	4/4	1ms	320 KiB
		7	Accepted	4/4	16ms	4152 KiB
		8	Accepted	4/4	3ms	824 KiB
		9	Accepted	4/4	1ms	320 KiB
		10	Accepted	4/4	1ms	496 KiB
		11	Accepted	4/4	4ms	1080 KiB
		12	Accepted	4/4	16ms	4152 KiB
		13	Accepted	4/4	14ms	3640 KiB
		14	Accepted	4/4	6ms	1720 KiB
		15	Accepted	2/2	1ms	320 KiB
		16	Accepted	2/2	1ms	320 KiB