最近的公平整数

/*
 * Leetcode Problem 2417: Closest Fair Integer
 * Problem Statement: Given a non-negative integer n, return the closest fair integer. 
 * A fair integer is an integer where the number of even digits is equal to the number of odd digits.
 * If there are multiple answers, return the smallest one.
 */

import java.util.stream.IntStream;

public class ClosestFairIntegerStream {
    // Helper method to count even and odd digits in a number using Java Streams
    private static boolean isFair(int num) {
        long evenCount = String.valueOf(num).chars()
                .filter(ch -> (ch - '0') % 2 == 0)
                .count();
        long oddCount = String.valueOf(num).chars()
                .filter(ch -> (ch - '0') % 2 != 0)
                .count();
        return evenCount == oddCount;
    }

    // Method to find the closest fair integer
    public static int closestFair(int n) {
        return IntStream.iterate(n, i -> i + 1)
                .filter(ClosestFairIntegerStream::isFair)
                .findFirst()
                .orElse(n);
    }

    public static void main(String[] args) {
        int n = 2334; // Example input
        System.out.println(closestFair(n)); // Output the closest fair integer
    }
}