#include"clist.h"
#include<stdio.h>
#include<stdlib.h>
#include<stddef.h>
#include<string.h>


struct point {
    int x, y;
    struct intrusive_node node;
};

void add_point(struct intrusive_list *list, int x, int y) {
    struct point *new_node = malloc(sizeof(struct point));
    new_node->x = x;
    new_node->y = y;
    add_node(list, &new_node->node);
}

void remove_point(struct intrusive_list *list, int x, int y) {
    struct intrusive_node *ptr = list->head;
    while (ptr->next) {
        struct point *rm_point = container_of(ptr->next, struct point, node);
        if (rm_point->x == x && rm_point->y == y) {
            remove_node(ptr->next);
        } else {
            ptr = ptr->next;
        }
    }
}

void show_all_points(struct intrusive_list *list) {
    struct intrusive_node *ptr = list->head;
    while (ptr->next) {
        struct point *show_point = container_of(ptr->next, struct point, node);
        printf("(%d %d) ", show_point->x, show_point->y);
        ptr = ptr->next;
    }
}

void remove_all_points(struct intrusive_list *list) {
    struct intrusive_node *ptr = list->head;
    while (ptr->next) {
        struct point *rm_point = container_of(ptr, struct point, node);
        remove_node(rm_point->node.next);

    }
}

int main() {
	struct intrusive_list list;
	init_list(&list);
	char str[256];
    int x, y;
    while (1 == 1) {
    	scanf("%255s", str);
        if (strcmp(str, "exit") == 0) {
            break;
        }
        if (strcmp(str, "rma") == 0) {
        	remove_all_points(&list);
        	continue;
        }
        if (strcmp(str, "len") == 0) {
            printf("%d\n", get_length(&list));
            continue;
        }
        if (strcmp(str, "print") == 0) {
            show_all_points(&list);
            continue;
        }
        if (strcmp(str, "add") == 0) {
            scanf("%i%i", &x, &y);
            add_point(&list, x, y);
            continue;
        }
        if (strcmp(str, "rm") == 0) {
            scanf("%d%d", &x, &y);
            remove_point(&list, x, y);
            continue;
        }
        printf("Unknown command\n");
    }
}