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#include <stdio.h>
#include <string.h>
#include <stdlib.h>

int queue[256];
int count = 0;

void insertIntoQueue(int x) {
    if (count == 256) {
        fprintf(stderr, "No more space in the queue\n");
        return;
    }
    queue[count] = x;
    count++;
}

int removeFromQueue() {
    if (count == 0) {
        fprintf(stderr, "No elements to extract from queue\n");
        return -1;
    }
    int res = queue[0];
    int i;
    for (i = 0; i < count - 1; i++) {
        queue[i] = queue[i + 1];
    }
    count--;
    return res;
}

int main(int argc, char* argv[]) {
    insertIntoQueue(1);
    insertIntoQueue(2);
    insertIntoQueue(3);
    insertIntoQueue(5);

    int i;
    int localCount = count;
    for (i = 0; i < localCount; i++) {
        printf("%d ", removeFromQueue());
    }

    return 0;
}