题目内容
（请给出正确答案）
A.可以通过UV，流速，电导，压力等不同的信号进行判断
B.Hold until的条件如果没有达到，可以通过timeout来设置hold的最长时间
C.当电导小于5mS/cm时结束平衡，开始上样可以通过hold until来实现
D.Hold until指令和Hold指令是一样的意思
答案
D、Hold until指令和Hold指令是一样的意思
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更多“关于Hold until，下列说法错误的是（）”相关的问题
淘汰赛问题
题目：
Our school is planning to hold a new exciting computer programming contest. During each round of the contest, the competitors will be paired, and compete head-to-head. The loser will be eliminated, and the winner will advance to next round. It proceeds until there is only one competitor left, who is the champion. In a certain round, if the number of the remaining competitors is not even, one of them will be chosed randomly to advance to next round automatically, and then the others will be paired and fight as usual. The contest committee want to know how many rounds is needed to produce to champion, then they could prepare enough problems for the contest.
Input
The input consists of several test cases. Each case consists of a single line containing a integer N - the number of the competitors in total. 1 ＜= N ＜= 2,147,483,647. An input with 0(zero) signals the end of the input, which should not be processed.
Output
For each test case, output the number of rounds needed in the contest, on a single line.
Sample Input
8
16
15
0
Sample Output
3
4
4
A.有重复性动作可以使用循环语句
B.for循环为执行无固定次数的循环
C.while循环为执行固定次数的循环
D.until循环执行无固定次数的循环
