백준 - 11727

https://www.acmicpc.net/problem/11727

11727번: 2×n 타일링 2

import java.io.*;

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int n = Integer.parseInt(br.readLine());
        int[] dp = new int[n + 1];
        dp[1] = 1; // 2 x 1일때
        if (n >= 2) dp[2] = 3; // 2 x 2일때
        for (int i = 3; i <= n; i++) {
            dp[i] = (dp[i - 1] + 2 * dp[i - 2]) % 10007; // 점화식
        }
        System.out.println(dp[n]);
    }
}