报数问题

标签：

问题描述：

        n个人站成一排，编号为1~n，现在从左向右报数“1,2,1,2.。。。”，报到1的人出列，报到2的人立即站到队伍的最后，如此循环往复，直到n个人全部出列为止。

public class LinkedQueue {

	QueueHead qh = new QueueHead();
	
	boolean empty() {
		return qh.front == null;        //or qh.rear == null
	}
	
	void enQueue(int e) {
		QNode q = new QNode(e);
		if(empty()) {
			qh.front = q;
			qh.rear = q;
		} else {
			qh.rear.next = q;
			qh.rear = q;
		}
	}
	
	int[] deQueue() {
		int[] arr = new int[2];
		if(qh.rear == null) {
			arr[0] = 0;
			return arr;
		}
		arr[0] = 1;
		arr[1] = qh.front.data;
		if(qh.front.next == null) {
			qh.front = qh.rear = null;
		} else {
			qh.front = qh.front.next;
		}
		return arr;
	}
	
	void display() {
		QNode p = qh.front;
		while(p != null) {
			if(p.next == null) {
				System.out.println(p.data);
			} else {
				System.out.print(p.data + "->");
			}
			p = p.next;
		}
	}
	
	public static void main(String[] args) {
		LinkedQueue sq = new LinkedQueue();
		for(int i=1; i<=8; i++) {
			sq.enQueue(i);
		}
		while(!sq.empty()) {
			
			
			
			int[] arr = sq.deQueue();
			System.out.print(arr[1] + " ");
			
			if(!sq.empty()) {
				arr = sq.deQueue();
				sq.enQueue(arr[1]);
			}
			
			
		}

	}

}

class QNode {
	int data;
	QNode next;
	QNode(){}
	QNode(int e) {
		data = e;
	}
}

class QueueHead {
	QNode front;
	QNode rear;
	public QueueHead() {}
}

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问题描述：

        n个人站成一排，编号为1~n，现在从左向右报数“1,2,3,1,2,3。。。”，报到2的人出列，报到1和3的人立即站到队伍的最后，如此循环往复，直到n个人全部出列为止。

public class LinkedQueue {

	QueueHead qh = new QueueHead();
	
	boolean empty() {
		return qh.front == null;        //or qh.rear == null
	}
	
	void enQueue(int e) {
		QNode q = new QNode(e);
		if(empty()) {
			qh.front = q;
			qh.rear = q;
		} else {
			qh.rear.next = q;
			qh.rear = q;
		}
	}
	
	int[] deQueue() {
		int[] arr = new int[2];
		if(qh.rear == null) {
			arr[0] = 0;
			return arr;
		}
		arr[0] = 1;
		arr[1] = qh.front.data;
		if(qh.front.next == null) {
			qh.front = qh.rear = null;
		} else {
			qh.front = qh.front.next;
		}
		return arr;
	}
	
	void display() {
		QNode p = qh.front;
		while(p != null) {
			if(p.next == null) {
				System.out.println(p.data);
			} else {
				System.out.print(p.data + "->");
			}
			p = p.next;
		}
	}
	
	public static void main(String[] args) {
		LinkedQueue sq = new LinkedQueue();
		for(int i=1; i<=8; i++) {
			sq.enQueue(i);
		}
		while(!sq.empty()) {
			int[] arr = sq.deQueue();
			sq.enQueue(arr[1]);
			
			
			arr = sq.deQueue();
			System.out.print(arr[1] + " ");
			
			if(!sq.empty()) {
				arr = sq.deQueue();
				sq.enQueue(arr[1]);
			}
			
			
		}

	}

}

class QNode {
	int data;
	QNode next;
	QNode(){}
	QNode(int e) {
		data = e;
	}
}

class QueueHead {
	QNode front;
	QNode rear;
	public QueueHead() {}
}

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报数问题

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原文地址：http://blog.csdn.net/qhairen/article/details/46458625