ikun必做

代码如下

#include<bits/stdc++.h>
using namespace std;
int main(){
	int n;
	cin>>n;
	int a[n]; 
	a[1]=1;
	a[2]=2;
	for(int i=3;i<=n;i++){
		a[i]=1;
		for(int j=1;j<=i/2;j++)
			a[i]+=a[j];
	}
	cout<<a[n];
	return 0;
}
//ikun万岁！ikun万岁！ikun万岁！ikun万岁！ikun万岁！ikun万岁！ikun万岁！ikun万岁！
//题解，勿抄，自己打一遍也是好的