Python 3.14 (Coding): Longest Common Prefix Test

The solution approach of problem is to finds the longest common prefix among a vector of strings. Initializes an empty string ans that will store the longest common prefix. The solution sorts the vector of strings v using sort from the funtion. Sorting the strings ensures that the first and last strings in the sorted vector will have the smallest and largest lexicographical order, respectively.

The function obtains the first string in the sorted vector using v[0] and the last string using v[n-1], where n is the size of the vector.

A for loop is used to iterate over the characters of the first and last strings up to the minimum length between them (min(first.size(), last.size())).

Inside the loop, the solution checks if the character at the current index i in the first string is not equal to the character at the same index in the last string. If they are not equal, it means the common prefix ends at this point, so the ans is returned as the result.

If the characters at the current index i are equal, the character is appended to the ans string.

After iterating through all the characters, the ans string contains the longest common prefix, so it is returned as the result.