foo.c: In function 'main':
foo.c:15:7: warning: implicit declaration of function 'abs' [-Wimplicit-function-declaration]
    t+=abs(s[i]-s[j]);
       ^~~
foo.c:20:2: warning: 'min' may be used uninitialized in this function [-Wmaybe-uninitialized]
  printf("%d",min);
  ^~~~~~~~~~~~~~~~

自豪的采用jd5进行评测(github.com/masnn/jd5)