import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); int n = in.nextInt(); int[] dp = new int[3]; // 下标0,1,2表示出生1、2、3个月的兔子 dp[0] = 1; for (int i = 1; i < n; i++) { dp[2] = dp[1] + dp[2]; dp[1] = dp[0]; dp[0] = dp[2]; } System....