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

void win() {
    FILE *fp = fopen("flag.txt", "rb");
    if (!fp) {
        perror("[!] Failed to open flag.txt");
        return;
    }

    char buffer[128];
    size_t n = fread(buffer, 1, sizeof(buffer), fp);
    fwrite(buffer, 1, n, stdout);
    fflush(stdout);
    printf("\n");
    fclose(fp);
}

int main() {
    char buf[32]; 

    printf("Welcome to the secure echo service!\n");
    printf("Please enter your name: ");
    fflush(stdout);

    read(0, buf, 128);

    printf("Hello, %s\n", buf);
    printf("Thank you for using our service.\n");

    return 0;
}