View Compilation Error

0_0_22238163_30443.cpp:4:1: error: 'LL' does not name a type
 LL phi[N];
 ^
0_0_22238163_30443.cpp: In function 'void xianxingshai()':
0_0_22238163_30443.cpp:12:5: error: 'phi' was not declared in this scope
     phi[1]=1;
     ^
0_0_22238163_30443.cpp: In function 'int main()':
0_0_22238163_30443.cpp:47:25: error: 'phi' was not declared in this scope
         printf("%lld\n",phi[b]-phi[a-1]);
                         ^