foo.cc: In function 'int main()':
foo.cc:15:8: warning: 'cnt' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<cnt<<endl;
        ^~~
foo.cc:28:3: warning: 'max' may be used uninitialized in this function [-Wmaybe-uninitialized]
   if(a[i]==max)
   ^~
foo.cc:20:6: note: 'max' was declared here
  int max,cnt;
      ^~~
foo.cc: In function 'int isearch(int*, int)':
foo.cc:33:9: warning: 'cnt' may be used uninitialized in this function [-Wmaybe-uninitialized]
  return cnt;
         ^~~
foo.cc:28:3: warning: 'max' may be used uninitialized in this function [-Wmaybe-uninitialized]
   if(a[i]==max)
   ^~

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