代码搜索：answer
找到约 6,541 项符合「answer」的源代码
代码结果 6,541
www.eeworm.com/read/272894/10937492
dpr ex.dpr
{
X is Answer.
Set Cn that Cn*2^n=Xn
C(n+1)*2^(n+1)
=X(n+1)
=Xn+10^n*k, Here k is 1 or 2, namely the first digit of X(n+1)
=Cn*2^n+10^n*k
=>
2*C(n+1)=Cn+5^n*k
if Cn is Odd then k=