将字符串拆分为递减的连续值

import java.util.*;
import java.util.stream.*;

/**
 * This method checks if the string s can be split into two or more non-empty substrings such that
 * the numeric values of the substrings are in descending order and each adjacent pair differs by 1.
 * The method uses Java Streams for an elegant solution.
 */
public class Solution {
    public boolean splitString(String s) {
        return IntStream.range(1, s.length())
                .mapToObj(i -> Long.parseLong(s.substring(0, i)))
                .anyMatch(first -> canSplit(s, first, 1));
    }

    private boolean canSplit(String s, long previous, int index) {
        if (index == s.length()) {
            return true;
        }
        return IntStream.range(index + 1, s.length() + 1)
                .mapToObj(i -> Long.parseLong(s.substring(index, i)))
                .anyMatch(current -> current == previous - 1 && canSplit(s, current, i));
    }
}