foo.cc: In function 'int main()':
foo.cc:26:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
     if(j==tmp)
     ^~
foo.cc:27:26: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
     a[i]=0,j=0,k--,x=x+1;tmp=b[x];  //当数到目标时，计数才清零。！！！不然，即使内循环结束，j也不清零，累计到下次外循环。
                          ^~~

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