View Compilation Error

0_0_21779631_23237.cpp:51:1: error: 'LL' does not name a type
 LL POW_MOD(LL n, LL m){
 ^
0_0_21779631_23237.cpp: In function 'int main()':
0_0_21779631_23237.cpp:67:38: error: 'a' was not declared in this scope
         for(ll i=1; i<=min(n,m); i++)a
                                      ^