foo.cc: In function 'int main()':
foo.cc:11:8: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  if(a<b&&a>c||a>b&&a<c) mid=a;
     ~~~^~~~~
foo.cc:12:13: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  else if(b<a&&b>c||b<c&&b>a) mid=b;
          ~~~^~~~~
foo.cc:4:24: warning: unused variable 'min' [-Wunused-variable]
  int a,b,c,mid=0,max=0,min=0;
                        ^~~

自豪的采用HydroJudge(https://github.com/hydro-dev/Hydro)进行评测。