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Problems

Hailstone HOTPO

Hailstone HOTPO

The hailstone sequence is formed in the following way: \begin{itemize} \item If $n$ is even, divide it by $2$ to get $n$ \item if $n$ is odd, multiply it by $3$ and add $1$ to get $n$ \end{itemize} It is conjectured that for any positive integer number $n$, the sequence will always end in the repeating cycle: $4, 2, 1, 4, 2, 1, ...$. Suffice to say, when $n = 1$, we will say the sequence has ended. Write a program to determine the largest value in the sequence for a given **n**. \InputFile The first line contains the number of data sets $t~(1 \le t \le 10^5)$ that follow. Each data set should be processed identically and independently. Each data set consists of a single line of input consisting of two space separated decimal integers. The first integer is the data set number. The second integer is $n~(1 \le n \le 10^5)$, which is the starting value. \OutputFile For each data set print a single line consisting of the data set number, one space, and the largest value in the sequence starting from $n$.
Time limit 3 seconds
Memory limit 128 MiB
Input example #1
4
1 1
2 3
3 9999
4 100000
Output example #1
1 1
2 16
3 101248
4 100000
Source 2012 Greater New York Region Programming Contest, October 28, Problem A