/in/foo.cc: In function 'void OutPut(int*, int)':
/in/foo.cc:12:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for(int i=0;i<n;i++)
  ^~~
/in/foo.cc:14:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
   cout<<endl;
   ^~~~
/in/foo.cc: In function 'int SetUnion(int*, int, int*, int, int*)':
/in/foo.cc:27:6: warning: unused variable 'i' [-Wunused-variable]
  int i,naa=0;
      ^