foo.c: In function 'main':
foo.c:7:17: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'char (*)[20]' [-Wformat=]
    7 |         scanf("%d",&arr);
      |                ~^  ~~~~
      |                 |  |
      |                 |  char (*)[20]
      |                 int *
foo.c:13:15: warning: 'm' may be used uninitialized in this function [-Wmaybe-uninitialized]
   13 |              m+=p;
      |              ~^~~

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