#include<iostream>using namespace std;int n;void f2(int x,int y);void f1(int x,int y){ if(x<n) f2(y,x+y);}void f2(int x,int y){ cout<<x<<' '; f1(y,x+y);}int main(){ cin>>n; f1(0,1); return 0; return 0;}输入：30 输出：_______________