LeetCode_729报错

本地测试用例：

package com.test;

import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Map.Entry;

public class LeetCode_729 {
    
    public static void main(String[] args) {
        MyCalendar myCalendar = new MyCalendar();
        myCalendar.book(10, 20);
        myCalendar.book(15, 25);
        myCalendar.book(20, 30);
        System.out.println(myCalendar.book(15, 25));
        
    }
}

class MyCalendar {
    
    private Map<Integer, Integer> timeHashMap = new LinkedHashMap<>();
    
    public MyCalendar() {
        
    }
    
    public boolean book(int start, int end) {
        Iterator<Entry<Integer, Integer>> iterator1 = timeHashMap.entrySet().iterator();
        
        while (iterator1.hasNext()) {
            Entry<Integer, Integer> next = iterator1.next();
            if (start > next.getKey() & start < next.getValue()) {
                return false;
                
            }
        }
        Iterator<Entry<Integer, Integer>> iterator2 = timeHashMap.entrySet().iterator();
        while (iterator2.hasNext()) {
            Entry<Integer, Integer> next = iterator2.next();
            if (end > next.getKey() & end < next.getValue()) {
                return false;
                
            }
        }
        timeHashMap.put(start, end);
        
        return true;
    }
}