题解 | #统计每个月兔子的总数#

#include <iostream>
using namespace std;

int Rabbits(int n);

int main()
{
    int day;
    cin >> day;
    cout << Rabbits(day) << endl;
    return 0;
}

int Rabbits(int n)
{
    if (n == 1 || n == 2)
        return 1;
    else
        return Rabbits(n - 1) + Rabbits(n - 2);
}