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g0001_0100.s0067_add_binary.readme.md Maven / Gradle / Ivy

67\. Add Binary

Easy

Given two binary strings `a` and `b`, return _their sum as a binary string_.

**Example 1:**

**Input:** a = "11", b = "1"

**Output:** "100"

**Example 2:**

**Input:** a = "1010", b = "1011"

**Output:** "10101"

**Constraints:**

*   1 <= a.length, b.length <= 104
*   `a` and `b` consist only of `'0'` or `'1'` characters.
*   Each string does not contain leading zeros except for the zero itself.