Problem: Minimum Flips to Make the Binary String Alternate

Medium

30 min

Understand the problem of transforming a binary string into an alternating sequence by applying minimal flips and rotations. Learn to implement an efficient solution that runs in linear time and constant space, helping you master this common coding challenge.

Statement

Given a binary string s, the following two operations can be performed in any sequence:

Type–1: Remove the character at the start of the string s and append it to the end of the string.
Type–2: Pick any character from the string and flip its value. in other words, if its value is $0$ , it becomes $1$ and vice versa.

Your task is to return the minimum number of type- $2$ operations that you need to perform before s becomes alternating.

Note: The string is called alternating if no two adjacent characters are equal.

Constraints:

$1 \leq$ s.length $\leq 10^5$
s[i] is either $0$ or $1$ .

Problem: Minimum Flips to Make the Binary String Alternate

Medium

30 min

Statement

Given a binary string s, the following two operations can be performed in any sequence:

Type–1: Remove the character at the start of the string s and append it to the end of the string.
Type–2: Pick any character from the string and flip its value. in other words, if its value is $0$ , it becomes $1$ and vice versa.

Your task is to return the minimum number of type- $2$ operations that you need to perform before s becomes alternating.

Note: The string is called alternating if no two adjacent characters are equal.

Constraints:

$1 \leq$ s.length $\leq 10^5$
s[i] is either $0$ or $1$ .

Problem: Minimum Flips to Make the Binary String Alternate

Statement

Examples

Understand the problem

Try it yourself

Problem: Minimum Flips to Make the Binary String Alternate

Statement

Examples

Understand the problem

Try it yourself