foo.c: In function 'ss':
foo.c:18:8: warning: unused variable 'b' [-Wunused-variable]
   18 |  int a,b;
      |        ^
foo.c: At top level:
foo.c:26:6: warning: return type of 'main' is not 'int' [-Wmain]
   26 | void main()
      |      ^~~~
foo.c: In function 'main':
foo.c:30:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   30 |  scanf("%d%d",&n1,&n2);
      |  ^~~~~~~~~~~~~~~~~~~~~
foo.c:33:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   33 |   scanf("%d",&a[i]);
      |   ^~~~~~~~~~~~~~~~~
foo.c:37:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   37 |   scanf("%d",&b[i]);
      |   ^~~~~~~~~~~~~~~~~

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