foo.c:5:1: warning: return type defaults to 'int' [-Wimplicit-int]
    5 | pd(int n)
      | ^~
foo.c: In function 'main':
foo.c:58:25: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'char *' [-Wformat=]
   58 |                 scanf("%d",&a[i]);
      |                        ~^  ~~~~~
      |                         |  |
      |                         |  char *
      |                         int *
      |                        %hhd
foo.c:62:25: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'char *' [-Wformat=]
   62 |                 scanf("%d",&b[i]);
      |                        ~^  ~~~~~
      |                         |  |
      |                         |  char *
      |                         int *
      |                        %hhd

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