View Compilation Error

0_0_29638700_19890.cpp: In function 'int main()':
0_0_29638700_19890.cpp:24:32: error: invalid operands of types 'long long int [15]' and '<unresolved overloaded function type>' to binary 'operator<'
   if(maxn<ans) cout<<0<<endl;a<endl;
                                ^