Karkit

input/code.cpp: In function 'int main()':
input/code.cpp:8:21: error: 'x' was not declared in this scope
     printf("%lu\n", x);
                     ^
input/code.cpp:7:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lu", &n);
     ~~~~~^~~~~~~~~~~

#include <stdio.h>

int main()
{
    // 0x3B9ACA07
    unsigned long n;
    scanf("%lu", &n);
    printf("%lu\n", x);

    return 0;
}