题解 | #统计每个月兔子的总数#

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {//斐波那契数列
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        int[] arr = new int[n];
        arr[0] = 1;
        arr[1] = 1;
        for (int i = 2; i < n; i++) {
            arr[i] = arr[i - 2] + arr[i - 1];
        }
        System.out.println(arr[n-1]);
    }
}