View Compilation Error

0_0_33527222_2397.cpp: In function 'void DFS(int, int, int)':
0_0_33527222_2397.cpp:49:46: error: too few arguments to function 'int Mul(long long int, int)'
   ans=Add(ans,Mul(Mul(u,Sub(inv[d],inv[d-1]))),inv[n/d]));
                                              ^
0_0_33527222_2397.cpp:25:12: note: declared here
 inline int Mul(register LL x,register int y){
            ^