foo.c: In function 'fun':
foo.c:4:12: warning: variable 'k' set but not used [-Wunused-but-set-variable]
    4 |  int i,j=1,k=a[0],m,flag=0;
      |            ^
foo.c: In function 'main':
foo.c:27:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   27 |  scanf("%d%d",&n,&m);
      |  ^~~~~~~~~~~~~~~~~~~
foo.c:29:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   29 |   scanf("%d",&a[i]);
      |   ^~~~~~~~~~~~~~~~~
foo.c:31:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   31 |   scanf("%d",&b[i]);
      |   ^~~~~~~~~~~~~~~~~

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