foo.cc: In function 'int main()':
foo.cc:7:26: warning: unused variable 'x' [-Wunused-variable]
  int a[10000],b[10000],n,x,n1;
                          ^
foo.cc: In function 'int quimin(int*, int)':
foo.cc:33:12: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   if(a[min]=a[i])
      ~~~~~~^~~~~
foo.cc: In function 'int quimin1(int*, int)':
foo.cc:49:12: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   if(b[min]=b[i])
      ~~~~~~^~~~~

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