foo.c: In function 'main':
foo.c:43:38: warning: unused variable 'y' [-Wunused-variable]
   43 |         int x = Merge(n1, a, n2, b), y = Merge(n1, d, n3, c);
      |                                      ^
foo.c:43:13: warning: unused variable 'x' [-Wunused-variable]
   43 |         int x = Merge(n1, a, n2, b), y = Merge(n1, d, n3, c);
      |             ^

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