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

char *__rdfl() {
    FILE *fl = fopen("flag.txt", "r");
    fseek(fl, 0, SEEK_END);
    unsigned long fs = (unsigned long)ftell(fl);
    fseek(fl, 0, SEEK_SET);
    char *buf = malloc(fs);
    fread(buf, 1, fs, fl);
    return buf;
}

int main() {
    printf("Input? ");
    int input;
    scanf("%d", &input);

    int f1 = 1;
    int f2 = 1;
    for(int step = 1; step <= 5; step++) {
        f1 = f1 * 2;
        if(step % 3 != 0) f2 = f2 * 3;
    }

    int code = input - f1 * f2;

    if(code == 0xC0DE) {
        char *__fl = __rdfl();
        printf("%s\n", __fl);
        free(__fl);
    }
    else {
        return -1;
    }
}