leetcode

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Published: Apr 8, 2023 License: MIT Imports: 1 Imported by: 0

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1017. Convert to Base -2

题目

Given a number N, return a string consisting of "0"s and "1"s that represents its value in base -2 (negative two).

The returned string must have no leading zeroes, unless the string is "0".

Example 1:

Input: 2
Output: "110"
Explantion: (-2) ^ 2 + (-2) ^ 1 = 2

Example 2:

Input: 3
Output: "111"
Explantion: (-2) ^ 2 + (-2) ^ 1 + (-2) ^ 0 = 3

Example 3:

Input: 4
Output: "100"
Explantion: (-2) ^ 2 = 4

Note:

  1. 0 <= N <= 10^9

题目大意

给出数字 N,返回由若干 "0" 和 "1"组成的字符串,该字符串为 N 的负二进制(base -2)表示。除非字符串就是 "0",否则返回的字符串中不能含有前导零。

提示:

  • 0 <= N <= 10^9

解题思路

  • 给出一个十进制的数,要求转换成 -2 进制的数
  • 这一题仿造十进制转二进制的思路,短除法即可。

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