foo.c: In function 'main':
foo.c:6:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
    6 |  scanf("%d%d%d", &m, &n, &p);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~
foo.c:11:4: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   11 |    scanf("%d", &A[i][j]);
      |    ^~~~~~~~~~~~~~~~~~~~~
foo.c:15:4: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   15 |    scanf("%d", &B[i][j]);
      |    ^~~~~~~~~~~~~~~~~~~~~

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