题解(ikun来看)

#include<bits/stdc++.h>
using namespace std;
int main(){
	int n;
	cin>>n;
	int f[n];
	f[1]=1;
	f[2]=2;
	for(int i=3;i<=n;++i){
		f[i]=f[i-2]+f[i/2];
	}
	cout<<f[n];
return 0;
}//kunkun!!!!!!!!!!!!!!!!!!!!!!!!!!!