foo.c: In function 'main':
foo.c:5:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
    5 |     scanf("%d",&n);
      |     ^~~~~~~~~~~~~~
foo.c:8:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
    8 |         scanf("%d",&k);
      |         ^~~~~~~~~~~~~~

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