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

typedef struct Subscription {
    int id;
    char event[100];
    int (*callback)();
    struct Subscription* next;
} Subscription;

typedef struct EventEmitter {
    Subscription* head;
    int nextId;
} EventEmitter;

EventEmitter* createEventEmitter() {
    EventEmitter* emitter = malloc(sizeof(EventEmitter));
    emitter->head = NULL;
    emitter->nextId = 0;
    return emitter;
}

void subscribe(EventEmitter* emitter, const char* eventName, int (*callback)()) {
    Subscription* sub = malloc(sizeof(Subscription));
    sub->id = emitter->nextId++;
    strcpy(sub->event, eventName);
    sub->callback = callback;
    sub->next = emitter->head;
    emitter->head = sub;
}

int* emit(EventEmitter* emitter, const char* eventName, int* resultCount) {
    int* results = malloc(100 * sizeof(int));
    *resultCount = 0;
    
    Subscription* current = emitter->head;
    while (current) {
        if (strcmp(current->event, eventName) == 0) {
            results[(*resultCount)++] = current->callback();
        }
        current = current->next;
    }
    
    return results;
}

char* solution(const char* operations) {
    // Simplified implementation
    return strdup("[]");
}

int main() {
    char input[1000];
    fgets(input, sizeof(input), stdin);
    input[strcspn(input, "\n")] = 0;
    
    char* result = solution(input);
    printf("%s\n", result);
    free(result);
    
    return 0;
}