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#include <stdbool.h>

#define MaxSize 100
#define ElemType int

typedef struct {
    ElemType data[MaxSize];
    int front, rear;
} SqQueue;

void InitQueue(SqQueue *Q) {
    Q->rear = Q->front = 0;
}

bool isEmpty(SqQueue Q) {
    if (Q.front == Q.rear)return true;
    return false;
}

bool EnQueue(SqQueue *Q, ElemType x) {
    if ((Q->rear + 1) % MaxSize == Q->front) return false;
    Q->data[Q->rear] = x;
    Q->rear = (Q->rear + 1) % MaxSize;
    return true;
}

bool DeQueue(SqQueue *Q, ElemType *x) {
    if (Q->rear == Q->front) return false;
    x = &(Q->data[Q->front]);
    Q->front = (Q->front + 1) % MaxSize;
    return true;
}