题解 | #不死神兔问题#

#include <iostream>
using namespace std;

int getSum(int n);

int main() {

    int n;
    cin >> n;

    cout << getSum(n) << endl;

    return 0;
}

int getSum(int n) {

    // write your code here......
    if(n==1||n==2){
        return 1;
    }
    else{
        return getSum(n-2)+getSum(n-1);
    }

}