foo.c: In function 'main':
foo.c:6:6: warning: unused variable 'x' [-Wunused-variable]
  int x;
      ^
foo.c: In function 'Unique':
foo.c:32:10: warning: unused variable 'k' [-Wunused-variable]
  int i,j,k;
          ^
foo.c:32:8: warning: unused variable 'j' [-Wunused-variable]
  int i,j,k;
        ^
foo.c:32:6: warning: unused variable 'i' [-Wunused-variable]
  int i,j,k;
      ^
foo.c: In function 'main':
foo.c:7:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n1,&n2);
  ^~~~~~~~~~~~~~~~~~~~~
foo.c:10:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&a1[i]);
   ^~~~~~~~~~~~~~~~~~
foo.c:12:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&a2[i]);
   ^~~~~~~~~~~~~~~~~~

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