docs: private int findcheckchild(int pos){
  		int rlt;
  		rlt = leftchild(pos);
  		if(rlt==size)
  			return rlt;
  		if (isMinRootHeap?(scores[rlt] > scores[rlt + 1]):(scores[rlt] < scores[rlt + 1]))
  			rlt = rlt + 1;
  		return rlt;
  	}