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g0901_1000.s0926_flip_string_to_monotone_increasing.readme.md Maven / Gradle / Ivy

926\. Flip String to Monotone Increasing

Medium

A binary string is monotone increasing if it consists of some number of `0`'s (possibly none), followed by some number of `1`'s (also possibly none).

You are given a binary string `s`. You can flip `s[i]` changing it from `0` to `1` or from `1` to `0`.

Return _the minimum number of flips to make_ `s` _monotone increasing_.

**Example 1:**

**Input:** s = "00110"

**Output:** 1

**Explanation:** We flip the last digit to get 00111.

**Example 2:**

**Input:** s = "010110"

**Output:** 2

**Explanation:** We flip to get 011111, or alternatively 000111.

**Example 3:**

**Input:** s = "00011000"

**Output:** 2

**Explanation:** We flip to get 00000000.

**Constraints:**

*   1 <= s.length <= 105
*   `s[i]` is either `'0'` or `'1'`.