src2020/3045_fangcheng/main.cpp

#include <bits/stdc++.h>
using namespace std;
int main()
{
    long long n,ans=0;
    cin>>n;
    for(int i=0;i*i*i<=n;i++){
        ans+=floor(sqrt(n-i*i*i))+1;
    }
    cout<<ans;
}