foo.c: In function 'main':
foo.c:12:9: warning: zero-length gnu_printf format string [-Wformat-zero-length]
  printf("");
         ^~
foo.c:14:9: warning: zero-length gnu_printf format string [-Wformat-zero-length]
  printf("");
         ^~
foo.c:22:9: warning: zero-length gnu_printf format string [-Wformat-zero-length]
  printf("");
         ^~
foo.c:13:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d",&m,&n,&p);
  ^~~~~~~~~~~~~~~~~~~~~~~~
foo.c:19:4: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d",&nums1[i][j]);
    ^~~~~~~~~~~~~~~~~~~~~~~~
foo.c:27:4: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d",&nums2[i][j]);
    ^~~~~~~~~~~~~~~~~~~~~~~~

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