foo.c: In function 'Second1':
foo.c:23:1: warning: control reaches end of non-void function [-Wreturn-type]
   23 | }
      | ^
foo.c: In function 'Second2':
foo.c:41:1: warning: control reaches end of non-void function [-Wreturn-type]
   41 | }
      | ^
foo.c: In function 'main':
foo.c:49:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   49 |  scanf("%d%d",&a1,&b1);
      |  ^~~~~~~~~~~~~~~~~~~~~
foo.c:51:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   51 |  scanf("%d",a+i);
      |  ^~~~~~~~~~~~~~~
foo.c:53:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   53 |  scanf("%d",b+i);
      |  ^~~~~~~~~~~~~~~

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