foo.c: In function 'input':
foo.c:4:18: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
    4 |  for(i=0;i<n;i++)scanf("%d ",&a[i]);}
      |                  ^~~~~~~~~~~~~~~~~~
foo.c: In function 'main':
foo.c:13:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   13 |  scanf("%d",&n);
      |  ^~~~~~~~~~~~~~
foo.c:14:25: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   14 |  if(n<10000){input(a,n);scanf("%d",&x);insert(a,n,x);}}
      |                         ^~~~~~~~~~~~~~
foo.c: In function 'insert':
foo.c:6:9: warning: 'j' may be used uninitialized in this function [-Wmaybe-uninitialized]
    6 | { int i,j;
      |         ^

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