View Compilation Error

0_0_18456673_15911.cpp: In function 'Matrix Matrix_Multi(Matrix, Matrix, LL)':
0_0_18456673_15911.cpp:45:19: error: 'struct Matrix' has no member named 'm'
                 c.m[i][j] = (c.m[i][j]%MOD + (a.m[i][k]%MOD)*(b.m[k][j]%MOD)%MOD)%MOD;
                   ^
0_0_18456673_15911.cpp:45:32: error: 'struct Matrix' has no member named 'm'
                 c.m[i][j] = (c.m[i][j]%MOD + (a.m[i][k]%MOD)*(b.m[k][j]%MOD)%MOD)%MOD;
                                ^
0_0_18456673_15911.cpp:45:49: error: 'struct Matrix' has no member named 'm'
                 c.m[i][j] = (c.m[i][j]%MOD + (a.m[i][k]%MOD)*(b.m[k][j]%MOD)%MOD)%MOD;
                                                 ^
0_0_18456673_15911.cpp:45:65: error: 'struct Matrix' has no member named 'm'
                 c.m[i][j] = (c.m[i][j]%MOD + (a.m[i][k]%MOD)*(b.m[k][j]%MOD)%MOD)%MOD;
                                                                 ^