题目描述
The Up-up of a number a by a positive integer b, denoted by a↑↑b, is recursively defined by:
a↑↑1 = a,
a↑↑(k+1) = a (a↑↑k).
Thus we have e.g. 3↑↑2 = 33 = 27, hence 3↑↑3 = 327= 7625597484987 and 3↑↑4 is roughly 103.6383346400240996*10^12.
The problem is give you a pair of a and k,you must calculate a↑↑k ,the result may be large you can output the answer mod 100000000 instead.
输入
A pair of a and k .a is a positive integer and fit in __int64 and 1<=k<=200.