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

#define OUTPUT_BUFFER_SIZE (1024 * 5) // 5KB

int main() {
    char *data = (char *)malloc(10 * 1024); // Allocate 10KB
    if (!data) {
        fprintf(stderr, "Failed to allocate memory.\n");
        return 1;
    }

    ssize_t bytesRead = read(STDIN_FILENO, data, 10 * 1024);
    if (bytesRead == -1) {
        fprintf(stderr, "Failed to read data from file.\n");
        free(data);
        return 1;
    }

    // Create a combined buffer to hold the output
    char *combined_output = malloc(2 * OUTPUT_BUFFER_SIZE + 50); // 50 extra bytes for text and safety
    if (!combined_output) {
        fprintf(stderr, "Failed to allocate memory for combined output.\n");
        free(data);
        return 1;
    }

    // Format the output in a single buffer
    int offset = sprintf(combined_output, "Buffer 1 (First 5KB): ");
    memcpy(combined_output + offset, data, OUTPUT_BUFFER_SIZE);
    offset += OUTPUT_BUFFER_SIZE;
    offset += sprintf(combined_output + offset, " Buffer 2 (Second 5KB): ");
    memcpy(combined_output + offset, data + OUTPUT_BUFFER_SIZE, OUTPUT_BUFFER_SIZE);

    // Print everything in one go
    fwrite(combined_output, sizeof(char), offset + OUTPUT_BUFFER_SIZE, stdout);
    printf("\n");

    // Clean up
    free(data);
    free(combined_output);

    return 0;
}