Description对于给定的数n,求第k小的a^b (a,b 都为质数),其值大于要大于NInput一行:n k (1<=n<=10^18, 1<=k<=100000)Output一行:答案Sample Input第一组: 22 1 第二组: 22 2 Sample Output第一组: 25 第二组: 27 HintSource