Problems in Computer Science are often classified as belonging to a certain class of problems (e.g., NP, Unsolvable, Recursive). In this problem you will be analyzing a property of an algorithm whose classification is not known for all possible inputs.
Consider the following algorithm:
範例輸入 1
1 10 100 200 201 210 900 1000
範例輸出 1
1 10 20 100 200 125 201 210 89 900 1000 174
Pro 專屬功能: 查看這題在歷屆 CPE 出現過幾次 — 升級以解鎖.
Given the input 22, the following sequence of numbers will be printed:
It is conjectured that the algorithm above will terminate (when a 1 is printed) for any integral input value. Despite the simplicity of the algorithm, it is unknown whether this conjecture is true. It has been verified, however, for all integers such that (and, in fact, for many more numbers than this).
Given an input , it is possible to determine the number of numbers printed before and including the 1 is printed. For a given this is called the cycle-length of . In the example above, the cycle length of 22 is 16.
For any two numbers and you are to determine the maximum cycle length over all numbers between and including both and .
The input will consist of a series of pairs of integers and , one pair of integers per line. All integers will be less than 10,000 and greater than 0.
You should process all pairs of integers and for each pair determine the maximum cycle length over all integers between and including and . You can assume that no operation overflows a 32-bit integer.
For each pair of input integers and you should output , , and the maximum cycle length for integers between and including and . These three numbers should be separated by at least one space with all three numbers on one line and with one line of output for each line of input. The integers and must appear in the output in the same order in which they appeared in the input and should be followed by the maximum cycle length (on the same line).