View Compilation Error

0_0_15104620_5456.cpp: In function 'int main()':
0_0_15104620_5456.cpp:10:10: error: 'Moblus' was not declared in this scope
  Moblus(N);
          ^
0_0_15104620_5456.cpp:22:32: error: 'mu' was not declared in this scope
   for(ll k=1;n*k<=a;k++) ans1+=mu[k]*(a/(k*n))*(b/(k*n));
                                ^
0_0_15104620_5456.cpp:23:32: error: 'mu' was not declared in this scope
   for(ll k=1;n*k<=a;k++) ans2+=mu[k]*(a/(k*n))*(a/(k*n));
                                ^