Given a function rand7
which generates a uniform random integer in the range 1 to 7, write a function rand10
which generates a uniform random integer in the range 1 to 10.
Do NOT use system‘s Math.random()
.
Example 1:
Input: 1 Output: [7]
Example 2:
Input: 2 Output: [8,4]
Example 3:
Input: 3 Output: [8,1,10]
Note:
rand7
is predefined.- Each testcase has one argument:
n
, the number of times thatrand10
is called.
Follow up:
- What is the expected value for the number of calls to
rand7()
function? - Could you minimize the number of calls to
rand7()
?
s
原文地址:https://www.cnblogs.com/grandyang/p/9727206.html
时间: 2024-10-10 13:40:23