题解 | #统计每个月兔子的总数#

import java.util.*;
public class Main{
    public static void main(String[] args){
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        int count = 0;
        int[] num = new int[32];
        num[1] = 1;
        num[2] = 1;
        for(int i = 3; i<=n; i++){
            num[i] = num[i-1]+num[i-2];
        }
        System.out.print(num[n]);
    }
}