foo.c: In function 'main':
foo.c:16:22: warning: variable 'c' set but not used [-Wunused-but-set-variable]
   16 |  int a[1000],b[1000],c[1000];
      |                      ^
foo.c:16:14: warning: variable 'b' set but not used [-Wunused-but-set-variable]
   16 |  int a[1000],b[1000],c[1000];
      |              ^
foo.c:16:6: warning: variable 'a' set but not used [-Wunused-but-set-variable]
   16 |  int a[1000],b[1000],c[1000];
      |      ^
foo.c:18:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   18 |  scanf("%d",&n1);
      |  ^~~~~~~~~~~~~~~
foo.c:19:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   19 |  scanf("%d",&n2);
      |  ^~~~~~~~~~~~~~~
foo.c:20:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   20 |  scanf("%d",&n3);
      |  ^~~~~~~~~~~~~~~
foo.c:23:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   23 |   scanf("%d",&x);
      |   ^~~~~~~~~~~~~~
foo.c:30:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   30 |   scanf("%d",&y);
      |   ^~~~~~~~~~~~~~
foo.c:36:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   36 |   scanf("%d",&z);
      |   ^~~~~~~~~~~~~~

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