View Compilation Error

0_0_38722786_7526.cpp: In function 'bool Miller_Rabin(ll)':
0_0_38722786_7526.cpp:81:22: error: 'pos_mod' was not declared in this scope; did you mean 'pow_mod'?
   81 |                 ll x=pos_mod(a,d,p);
      |                      ^~~~~~~
      |                      pow_mod