View Compilation Error

0_0_29773036_24339.cpp: In function 'bool M_L(long long int, long long int)':
0_0_29773036_24339.cpp:17:17: error: 'mod' was not declared in this scope
  ll x=mod(a,mi,n); // 返回a^m mod n的值
                 ^
0_0_29773036_24339.cpp: In function 'int main()':
0_0_29773036_24339.cpp:46:5: error: 'cnt' was not declared in this scope
     cnt++;
     ^
0_0_29773036_24339.cpp:49:9: error: 'cnt' was not declared in this scope
   cout<<cnt<<endl;
         ^