求助一下

#include<bits/stdc++.h>
using namespace std;
int main()
{
	int k,ans=0,gold,day=1;
	cin>>k;
	for(int i=1;i<=k;)
	{
		gold=day;
		for(int j=1;j<=day;j++)
			ans+=gold;
		day++;
		i+=day;
	}
	cout<<ans<<endl;
	return 0;
}