View Compilation Error

0_0_38789150_11393.cpp: In function 'int main()':
0_0_38789150_11393.cpp:82:35: error: invalid initialization of reference of type 'matrix&' from expression of type 'long long int'
   82 |                         cout<<ksm(a,b,p)<<endl;
      |                                   ^
0_0_38789150_11393.cpp:41:20: note: in passing argument 1 of 'matrix ksm(matrix&, long long int, long long int)'
   41 | matrix ksm(matrix &a,ll q,ll mod)
      |            ~~~~~~~~^