foo.cc: In function 'int main()':
foo.cc:20:4: warning: 'b' may be used uninitialized in this function [-Wmaybe-uninitialized]
    if(k>aw)
    ^~
foo.cc:6:33: note: 'b' was declared here
     int min,max,i,j,n[10]={0},a,b;
                                 ^

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