View Compilation Error

0_0_33561542_12529.cpp: In function 'mat operator*(mat, mat)':
0_0_33561542_12529.cpp:13:8: error: declaration of 'll x' shadows a parameter
     ll x;
        ^
0_0_33561542_12529.cpp:19:19: error: request for member 'm' in 'x', which is of non-class type 'll {aka long long int}'
             x+=(x.m[i][k]*y.m[k][j])%(mod-1);
                   ^