#include <stdio.h>
#include <pthread.h>
 
#define THREADS 3
 
void* task(void* arg) {
    int id = *(int*)arg;
    printf("Thread %d started\n", id);
    printf("Thread %d finished\n", id);
    return NULL;
}
 
int main() {
    pthread_t threads[THREADS];
    int ids[THREADS];
 
    for(int i = 0; i < THREADS; i++) {
        ids[i] = i + 1;
        pthread_create(&threads[i], NULL, task, &ids[i]);
    }
 
    for(int i = 0; i < THREADS; i++) {
        pthread_join(threads[i], NULL);
    }
 
    printf("All threads completed\n");
 
    return 0;
}

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