View Compilation Error

0_0_34685385_13985.cpp: In function 'int main()':
0_0_34685385_13985.cpp:84:19: error: 'struct Mar' has no member named 'n'
  for (int i=0;i<C.n;i++)
                   ^
0_0_34685385_13985.cpp:88:20: error: 'struct Mar' has no member named 'm'
   for (int i=0;i<C.m;i++)
                    ^