# [1017. Convert to Base -2](https://leetcode.com/problems/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。