整数替换

/*
 * This code provides a solution for the given problem using Java Streams.
 * Streams in Java are typically used for collections, so here we use an
 * iterative approach wrapped in a lambda function to apply the necessary
 * operations. Note that using Streams directly for this problem isn't
 * the most natural fit, but we can simulate a stream-like behavior.
 */
import java.util.function.IntUnaryOperator;
import java.util.stream.IntStream;
 
public class Solution {
    public int integerReplacement(int n) {
        IntUnaryOperator operator = num -> {
            int count = 0;
            while (num != 1) {
                if (num % 2 == 0) {
                    num /= 2;
                } else if (num == 3 || (num & 2) == 0) {
                    num--;
                } else {
                    num++;
                }
                count++;
            }
            return count;
        };
        return operator.applyAsInt(n);
    }
}