/in/foo.cc: In function 'int main()':
/in/foo.cc:34:7: error: 'j' was not declared in this scope
   for(j=0;j<x;j++)
       ^
/in/foo.cc:47:6: error: 'i' was not declared in this scope
  for(i=0;i<T;i++)
      ^
/in/foo.cc:16:16: warning: unused variable 'g' [-Wunused-variable]
  int T,n,m;int g;
                ^