백준 1904

package baekjoon.DP;

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

public class Main1904 {

   private static int[] D;

   public static void main(String[] args) throws Exception {
      BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
      int N = Integer.parseInt(br.readLine());
      D = new int[1000001];
      go(N);
      System.out.println(D[N]);
   }

   static int go2(int N) {
      if (N == 0 || N == 1)
         return 1;
      if (N == 2)
         return 2;
      if (D[N] > 0)
         return D[N];
      return D[N] = (go2(N - 1) + go2(N - 2)) % 15746;
   }

   static void go(int N) {
      D[0] = 1;
      D[1] = 1;
      D[2] = 2;
      for (int i = 3; i <= N; i++) {
         D[i] = (D[i - 1] + D[i - 2]) % 15746;
      }
   }

   //D[N] = N개로 만들 수 있는 2진 수열
   //D[1] = 1
   //D[2] = 2
   //D[3] = 2
   //D[4] = 5
   //D[N] = D[N-1] +1
   //D[N] = D[N-2] + 2
   //D[N] = D[N-1] + D[N-2] + 3

}