#include "stdlib.h"
#include "stdio.h"

int main(int argc, char* argv[])
{
        char chKey[128] = {0};
        unsigned int unXORCode, unRemainder, unQuotient, unTmp, unMachineCode;
        printf("Please Key in the Machine Code:\n");
        scanf("%d", &unMachineCode);

        unXORCode   = unMachineCode ^ 0x90909090;
        unRemainder = unXORCode % 0x25;
        unQuotient  = unXORCode;
        if (unRemainder < 0x11)
        {
                unRemainder += 0x11;
        }

        int i;
        i = 0;
        while (unQuotient != 0)
        {
                unTmp          = unQuotient % unRemainder;
                unQuotient /= unRemainder;
                if (unTmp >= 0xa)
                {
                        unTmp = unTmp + 0x61 + 0xf6;
                        unTmp &= 0x0ff;
                        chKey[i] = unTmp;
                }
                else
                {
                        chKey[i] = unTmp + 0x30;
                }
                i++;
        }
        printf("Key is: \n");
        while (i >= 0)
        {
                printf("%c", chKey[i]);
                i--;
        }
        printf("\n");

        return 0;

        {
                printf("%c", chKey[i]);
                i--;
        }
        printf("\n");

        return 0;
}