int DelDigCfromA(int A, int C)
{
    if (A<=0 || C<0 || C>9) return -1;
    int result=0, multiplier=1;
    while (A>0)
    {
        int digit = A%10;
        if (digit!=C)
        {
            result = digit*multiplier + result;
            multiplier*=10;
        }
        A/=10;
    }
    return result;
}