3ta retake

#include <iostream>
#include <array>
#include <cctype>

const int maxSize = 150;

std::array<char, maxSize> readInput(int& textSize) {
	std::array<char, maxSize> arr{};
	for (int i = 0; i < textSize; ++i) {
		std::cin >> arr[i];
	}
	return arr;
}

void Solution(std::array<char, maxSize>& textOne, std::array<char, maxSize>& textTwo, int& textSize) {
	int differences = 0;

	for (int i = 0; i < textSize; ++i) {

		if (textOne[i] == textTwo[i]) {
			std::cout << textOne[i];
		}

		else if (std::abs(textOne[i] - textTwo[i]) == 32 && !ispunct(textOne[i]) && !ispunct(textTwo[i])) {
			if (isalpha(textOne[i])) {
				std::cout << textTwo[i];
			}
			else if (isalpha(textTwo[i])) {
				std::cout << textOne[i];
			}
		}

		else if (textOne[i] != textTwo[i]) {
			std::cout << '!';
			differences++;
		}
	}
	std::cout << std::endl;
	std::cout << differences;
}

int main() {
	int textSize;
	std::cin >> textSize;

	std::array<char, maxSize> textOne = readInput(textSize);
	std::array<char, maxSize> textTwo = readInput(textSize);

	Solution(textOne, textTwo, textSize);
}