foo.c: In function 'main':
foo.c:34:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   34 |     scanf("%d %d",&m,&n);
      |     ^~~~~~~~~~~~~~~~~~~~
foo.c:36:6: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   36 |      scanf("%d",&p[i]);
      |      ^~~~~~~~~~~~~~~~~
foo.c:39:6: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   39 |      scanf("%d %d %d",&k,&a,&b);
      |      ^~~~~~~~~~~~~~~~~~~~~~~~~~

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