foo.c: In function 'main':
foo.c:14:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   14 |  scanf("%d",&n);
      |  ^~~~~~~~~~~~~~
foo.c:16:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   16 |   scanf("%d",&a[i]);
      |   ^~~~~~~~~~~~~~~~~
foo.c: In function 'gys':
foo.c:8:9: warning: 'k' may be used uninitialized in this function [-Wmaybe-uninitialized]
    8 |  return k;
      |         ^
foo.c: In function 'main':
foo.c:4:8: warning: 'k' may be used uninitialized in this function [-Wmaybe-uninitialized]
    4 |  int x,k;
      |        ^

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