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- You are a product manager and currently leading a team to develop a new product. Unfortunately, the latest version of your product fails the quality check. Since each version is developed based on the previous version, all the versions after a bad version are also bad.
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- Suppose you have n versions [1, 2, ..., n] and you want to find out the first bad one, which causes all the following ones to be bad.
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- You are given an API bool isBadVersion(version) which will return whether version is bad. Implement a function to find the first bad version. You should minimize the number of calls to the API.
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- Example:
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- Given n = 5, and version = 4 is the first bad version.
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- call isBadVersion(3) -> false
- call isBadVersion(5) -> true
- call isBadVersion(4) -> true
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- Then 4 is the first bad version.
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