BOJ_15988 1,2,3 더하기 (3)

package DynamicProgramming;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class BOJ_15988 {
    static int t;
    static long[] dp;
    static BufferedReader br;

    public static void main(String[] args) throws IOException {
        br = new BufferedReader(new InputStreamReader(System.in));
        t = Integer.parseInt(br.readLine());
        dp = new long[1000001];
        dp[0] = 1;
        dp[1] = 1;
        dp[2] = 2;
        dp[3] = 4;
        for (int i = 4; i < 1000001; i++) {
            dp[i] = (dp[i - 1] + dp[i - 2] + dp[i - 3]) % 1000000009;
        }
        for (int i = 0; i < t; i++) {
            int temp = Integer.parseInt(br.readLine());
            System.out.println(dp[temp]);
        }
    }
}