Splitting StringGiven a string, find the minimum number of cuts needed to obtain a perfect string. A perfect string is a string that has only a single type of character. Example: aaaaa. A cut in the string should be done exactly in the middle dividing the string into two equal halves.Input FormatThe first line of input contains T - the number of test cases. It is followed by T lines, each line contains a single string consisting only of lowercase English alphabets.Output FormatFor each test case, print the minimum number of cuts required to get a perfect string, separated by a new line. If it is not possible to obtain a perfect string print -1.Constraints1 <= T <= 1031 <= len(str) <= 104ExampleInput2aacabbaaabOutput21ExplanationTest Case 1Cut-1: [aaca][bbaa], Cut-2: [bb][aa]Test Case 2Cut-1: [a][b]

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Solution 1

This problem is about string manipulation and can be solved using a simple approach. Here are the steps to solve this problem:

First, we need to read the number of test cases

Solution 2

This problem is about string manipulation and can be solved using a simple approach. Here are the steps to solve this

Solution 3

This problem is about string manipulation and can be solved using a simple approach. Here are the steps to solve this problem:

First, we need to read the number of test cases, T.
For each test case, we read the string.
We then count the frequency of each character in the string using a dictionary or a hash map.
We check if the length of the string is even. If it's not, we print -1 and move to the next test case because it's impossible to split an odd-length string into two equal halves.
If the length of the string is even, we check if there is any character in the string that appears more than half of the length of the string. If there is, we print -1 and move to the next test case because it's impossible to split the string into two equal halves where each half contains only one type of character.
If there is no such character, we calculate the minimum number of cuts required to get a perfect string. This can be done by subtracting the maximum frequency of a character from the half of the length of the string.
We print the minimum number of cuts required for each test case.

This is a simple and efficient approach to solve this problem. The time complexity of this approach is O(n) where n is the length of the string.

This problem has been solved

Solution 4

This problem is about string manipulation and can be solved using a simple approach. Here are the steps to solve this problem:

First, we need to read the number of test cases (T) from the input.
For each test case, we read the string.
We then count the frequency of each character in the string using a dictionary or a hash map.
We check if the string length is even. If it's not, we print -1 and move to the next test case because it's impossible to split an odd-length string into two equal halves.
If the string length is even, we check if there is any character in the string that appears more than half of the string length. If there is, we print -1 and move to the next test case because it's impossible to split the string into two equal halves where each half contains only a single type of character.
If there is no such character, we print the number of cuts required to get a perfect string. The number of cuts is equal to the number of unique characters in the string divided by 2.

Here is a Python code snippet that implements the above steps:

T = int(input())
for _ in range(T):
    s = input()
    freq = {}
    for c in s:
        if c in freq:
            freq[c] += 1
        else:
            freq[c] = 1
    if len(s) % 2 != 0:
        print(-1)
    else:
        for c in freq:
            if freq[c] > len(s) // 2:
                print(-1)
                break
        else:
            print(len(freq) // 2)

This code works by counting the frequency of each character in the string and then checking if it's possible to split the string into two equal halves where each half contains only a single type of character. If it's possible, it prints the number of cuts required. If it's not possible, it prints -1.

This problem has been solved

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