View Compilation Error

0_0_25429423_27129.cpp: In function 'long long int inv(long long int, long long int)':
0_0_25429423_27129.cpp:28:25: error: 'extend_gcd' was not declared in this scope
     d=extend_gcd(a,m,x,y);
                         ^
0_0_25429423_27129.cpp: At global scope:
0_0_25429423_27129.cpp:3:12: error: expected unqualified-id before 'long'
 #define LL long long
            ^
0_0_25429423_27129.cpp:37:7: note: in expansion of macro 'LL'
 bool (LL a1,LL m1,LL a2,LL m2,LL &a3,LL &m3)
       ^
0_0_25429423_27129.cpp:3:12: error: expected ')' before 'long'
 #define LL long long
            ^
0_0_25429423_27129.cpp:37:7: note: in expansion of macro 'LL'
 bool (LL a1,LL m1,LL a2,LL m2,LL &a3,LL &m3)
       ^
0_0_25429423_27129.cpp: In function 'long long int CRT_next(long long int*, long long int*, int)':
0_0_25429423_27129.cpp:63:36: error: 'merge' was not declared in this scope
         if(!merge(a1,m1,a2,m2,aa,mm))
                                    ^