How to view the longest common prefix in java

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Write a function to find the longest common prefix in a string array.

If no common prefix exists, an empty string "" is returned.

Example 1:

Enter: ["flower", "flow", "flight"]

Output: "fl"

Example 2:

Enter: ["dog", "racecar", "car"]

Output: "

Explanation: the input does not have a common prefix.

Description:

All inputs contain only the lowercase letter amurz.

Parsing:

First of all, we have to understand why the above should be subtracted. For example, CM means 900. if it doesn't, then the following for loop will add 100,100 when it is executed to C and 1000 when it is executed to M, for a total of 1100. In fact, CM means 900. it has to be subtracted from 200. the same is true for others.

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