View Compilation Error

0_0_32418089_28951.cpp: In function 'int main()':
0_0_32418089_28951.cpp:30:32: error: invalid operands of types '__int128' and '<unresolved overloaded function type>' to binary 'operator<<'
           cout<<(ll)(solve(n)<<endl;
                                ^
0_0_32418089_28951.cpp:30:36: error: expected ')' before ';' token
           cout<<(ll)(solve(n)<<endl;
                                    ^