foo.c: In function 'main':
foo.c:36:11: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'int' [-Wformat=]
   36 |   scanf("%d",a1[i]);
      |          ~^  ~~~~~
      |           |    |
      |           |    int
      |           int *
foo.c:38:11: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'int' [-Wformat=]
   38 |   scanf("%d",a2[i]);
      |          ~^  ~~~~~
      |           |    |
      |           |    int
      |           int *
foo.c:40:11: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'int' [-Wformat=]
   40 |   scanf("%d",a3[i]);
      |          ~^  ~~~~~
      |           |    |
      |           |    int
      |           int *
foo.c:34:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   34 |  scanf("%d%d%d",&n1,&n2,&n3);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~
foo.c:36:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   36 |   scanf("%d",a1[i]);
      |   ^~~~~~~~~~~~~~~~~
foo.c:38:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   38 |   scanf("%d",a2[i]);
      |   ^~~~~~~~~~~~~~~~~
foo.c:40:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   40 |   scanf("%d",a3[i]);
      |   ^~~~~~~~~~~~~~~~~

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