题解 | #统计每个月兔子的总数#

#include <string.h>
#include<algorithm>
#include<iostream>
#include<string>
using namespace std;

int a(int n)
{
    int b = 0;
    if(n==0)
    {
        b = 0;
    }
    else if(n==1)
    {
        b = 1;
    }
    else
    {
        b = a(n - 1) + a(n - 2);
    }
    return(b);
}
int main()
{
    int c;
    while (cin>> c)
    {
        
        cout << a(c) << '\n';
    }
    return(0);
}