foo.c: In function 'Unique':
foo.c:5:13: warning: unused variable 'num' [-Wunused-variable]
    5 |         int num = 0;
      |             ^~~
foo.c: In function 'main':
foo.c:35:33: warning: unused variable 'bb' [-Wunused-variable]
   35 |         int aa = Unique(n1, a), bb = Unique(n2, b);
      |                                 ^~
foo.c:35:13: warning: unused variable 'aa' [-Wunused-variable]
   35 |         int aa = Unique(n1, a), bb = Unique(n2, b);
      |             ^~

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