foo.c: In function 'Insert':
foo.c:35:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
foo.c: In function 'main':
foo.c:40:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n1);
  ^~~~~~~~~~~~~~~~
foo.c:41:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n2);
  ^~~~~~~~~~~~~~~~
foo.c:44:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &A[i]);
   ^~~~~~~~~~~~~~~~~~
foo.c:48:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &B[i]);
   ^~~~~~~~~~~~~~~~~~
foo.c: In function 'Insert':
foo.c:19:7: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
    if (x > A[i])
       ^

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