Submission #21,162

2026-01-12 15:11:29

cpp17

Accepted 50/50

9ms

4252 KiB

#include <iostream>

using namespace std;

int main()
{
    int n;
    cin>>n;
    if(n<=3)cout<<2*n*n-4*n+4;
    else{
        int t[n];
        t[0]=2;
        t[1]=4;
        t[2]=10;
        for(int i=3; i<n; i++)t[i]=(2*t[i-1]+2*t[i-3])%20210108;
        cout<<t[n-1];
    }
    return 0;
}

	Sum	Test	Verdict		Time	Memory
base	50/50
		1	Accepted	0/0	1ms	316 KiB
		2	Accepted	0/0	1ms	316 KiB
		3	Accepted	3/3	1ms	316 KiB
		4	Accepted	3/3	1ms	316 KiB
		5	Accepted	4/4	1ms	348 KiB
		6	Accepted	4/4	1ms	316 KiB
		7	Accepted	4/4	9ms	4252 KiB
		8	Accepted	4/4	2ms	816 KiB
		9	Accepted	4/4	1ms	316 KiB
		10	Accepted	4/4	1ms	316 KiB
		11	Accepted	4/4	3ms	1164 KiB
		12	Accepted	4/4	8ms	4148 KiB
		13	Accepted	4/4	8ms	3636 KiB
		14	Accepted	4/4	4ms	1588 KiB
		15	Accepted	2/2	1ms	316 KiB
		16	Accepted	2/2	1ms	316 KiB