Дз от 02.12.2024г.

#include <iostream>
#include <cstring>

bool isPalindrome(const char* str) {
    int left = 0, right = strlen(str) - 1;
    while (left < right) {
        if (str[left++] != str[right--]) {
            return false;
        }
    }
    return true;
}

bool isPrime(int n) {
    if (n <= 1) {
        return false;
    }
    if (n <= 3) {
        return true;
    }
    if (n % 2 == 0 || n % 3 == 0) {
        return false;
    }
    for (int i = 5; i * i <= n; i += 6) {
        if (n % i == 0 || n % (i + 2) == 0) {
            return false;
        }
    }
    return true;
}

bool isLeapYear(int year) {
    return (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0);
}

int main() {
    char str[] = "racecar";
    int num = 29;
    int year = 2024;

    std::cout << "String: " << str << ", Palindrome?: " << (isPalindrome(str) ? "true" : "false") << std::endl;
    std::cout << "Number: " << num << ", Prime?: " << (isPrime(num) ? "true" : "false") << std::endl;
    std::cout << "Year: " << year << ", Leap Year?: " << (isLeapYear(year) ? "true" : "false") << std::endl;

    return 0;
}