foo.c: In function 'Second1':
foo.c:24:1: warning: control reaches end of non-void function [-Wreturn-type]
   24 | }
      | ^
foo.c: In function 'Second2':
foo.c:47:1: warning: control reaches end of non-void function [-Wreturn-type]
   47 | }
      | ^
foo.c: In function 'main':
foo.c:53:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   53 |  scanf("%d%d",&a1,&b1);
      |  ^~~~~~~~~~~~~~~~~~~~~
foo.c:55:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   55 |  scanf("%d",a+i);
      |  ^~~~~~~~~~~~~~~
foo.c:57:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   57 |  scanf("%d",b+i);
      |  ^~~~~~~~~~~~~~~

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