(魔法数字) 小 H 的魔法数字是 4。给定 n, 他希望用若干个 4 进行若干次加法、减法和整除运算得到 n。但由于小 H 计算能力有限,计算过程中只能出现不超过 M=10000的正整数。求至少可能用到多少个 4。
例如,当 n=2时,有 2=\(\frac{4+4}{4}\),用到了 3 个 4,是最优方案。
0 of 4 Questions completed
Questions:
You have already completed the quiz before. Hence you can not start it again.
Quiz is loading…
You must sign in or sign up to start the quiz.
You must first complete the following:
0 of 4 Questions answered correctly
Your time:
Time has elapsed
You have reached 0 of 0 point(s), (0)
Earned Point(s): 0 of 0, (0)
0 Essay(s) Pending (Possible Point(s): 0)
1、①处应填( )
2、②处应填( )
3、③处应填( )
4、④处应填( )