View Compilation Error

0_0_26606141_8879.cpp:5:1: error: 'll' does not name a type
 ll mu[NUM];
 ^
0_0_26606141_8879.cpp: In function 'int main()':
0_0_26606141_8879.cpp:19:28: error: 'mu' was not declared in this scope
             ans+=flag*(1.0/mu[i]);
                            ^
0_0_26606141_8879.cpp: In function 'void init()':
0_0_26606141_8879.cpp:29:5: error: 'mu' was not declared in this scope
     mu[0]=1,mu[1]=1;
     ^