#include <stdio.h>
#define SIZE 3

typedef struct {
    int a[SIZE];
    int front;
    int rear;
} Queue;

void enq(Queue* q, int val) {
    q -> a[q -> rear] = val;
    q -> rear = (q -> rear + 1) % SIZE;
}

int deq(Queue* q) {
    int val = q -> a[q -> front];
    q -> front = (q -> front + 1) % SIZE;
    return val;
}

int main() {
    Queue q = {{0}, 0, 0};
    enq(&q, 1);
    enq(&q, 2);
    deq(&q);
    enq(&q, 3);
    printf("%d 그리고 %d", deq(&q), deq(&q));
    return 0;
}