foo.c: In function 'judgement':
foo.c:33:17: warning: implicit declaration of function 'abs' [-Wimplicit-function-declaration]
   33 |         else if(abs(small1-small2)==2&&small1>small2&&small2>=type-1)
      |                 ^~~
foo.c:3:1: note: include '<stdlib.h>' or provide a declaration of 'abs'
    2 | #include<math.h>
  +++ |+#include <stdlib.h>
    3 | char score[100];

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