Leetcode—622. 设计循环队列【中等】

news2025/2/22 8:55:19

2024每日刷题（128）

Leetcode—622. 设计循环队列

在这里插入图片描述

实现代码

class MyCircularQueue {
public:
    MyCircularQueue(int k): q(k) {
        qSize = k;
    }
    
    bool enQueue(int value) {
        if(isFull()) {
            return false;
        }
        q[rear] = value;
        rear = (rear + 1) % qSize;
        deflag = false;
        enflag = true;
        return true;
    }
    
    bool deQueue() {
        if(isEmpty()) {
            return false;
        }
        front = (front + 1) % qSize;
        deflag = true;
        enflag = false;
        return true;
    }
    
    int Front() {
        if(isEmpty()) {
            return -1;
        }
        return q[front];
    }
    
    int Rear() {
        if(isEmpty()) {
            return -1;
        }
        return q[(rear - 1 + qSize) % qSize];
    }
    
    bool isEmpty() {
        if(deflag && front == rear) {
            return true;
        }
        if(enflag == false && rear == 0 && deflag == false) {
            return true;
        }
        return false;
    }
    
    bool isFull() {
        if(enflag && front == rear) {
            return true;
        }
        return false;
    }

private:
    vector<int> q;
    int qSize = -1;
    int front = 0;
    int rear = 0;
    int enflag = false;
    int deflag = false;
};

/**
 * Your MyCircularQueue object will be instantiated and called as such:
 * MyCircularQueue* obj = new MyCircularQueue(k);
 * bool param_1 = obj->enQueue(value);
 * bool param_2 = obj->deQueue();
 * int param_3 = obj->Front();
 * int param_4 = obj->Rear();
 * bool param_5 = obj->isEmpty();
 * bool param_6 = obj->isFull();
 */