foo.c: In function 'main':
foo.c:31:15: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
   31 |         if(p%c==0&q%c==0)
      |            ~~~^~~
foo.c:66:49: warning: unused variable 'i' [-Wunused-variable]
   66 |                                         for(int i=d;d>=1;d--)
      |                                                 ^

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