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

#define NUM_THREADS 4  // Number of threads to use
#define VECTOR_SIZE 100  // Size of the array

// Structure to pass information to threads
typedef struct {
    int start;  // Starting index for this thread
    int end;    // Ending index for this thread
    int *vector;  // Pointer to the array
} ThreadData;

// Function that each thread will execute
void *increment_vector(void *arg) {
    ThreadData *data = (ThreadData *)arg;

    // Increment the array elements in the specified range
    for (int i = data->start; i < data->end; i++) {
        data->vector[i]++;
    }

    pthread_exit(NULL);
}

int main() {
    int vector[VECTOR_SIZE];
    pthread_t threads[NUM_THREADS];
    ThreadData thread_data[NUM_THREADS];
    int segment_size = VECTOR_SIZE / NUM_THREADS;

    // Initialize the array
    for (int i = 0; i < VECTOR_SIZE; i++) {
        vector[i] = i;
    }

    // Create threads and assign them segments of the array
    for (int i = 0; i < NUM_THREADS; i++) {
        thread_data[i].start = i * segment_size;
        thread_data[i].end = (i == NUM_THREADS - 1) ? VECTOR_SIZE : (i + 1) * segment_size;
        thread_data[i].vector = vector;

        pthread_create(&threads[i], NULL, increment_vector, (void *)&thread_data[i]);
    }

    // Wait for all threads to complete
    for (int i = 0; i < NUM_THREADS; i++) {
        pthread_join(threads[i], NULL);
    }

    // Display the incremented array
    for (int i = 0; i < VECTOR_SIZE; i++) {
        printf("%d\n", vector[i]);
    }

    return 0;
}