C - Recaman's Sequence
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Time Limit:3000MS Memory Limit:60000KB 64bit IO Format:%I64d & %I64u
Submit Status Practice POJ 2081
System Crawler (2016-05-11)
Description
The Recaman's sequence is defined by a0 = 0 ; for m > 0, a
m = a
m−1 − m if the rsulting a
m is positive and not already in the sequence, otherwise a
m = a
m−1 + m.
The first few numbers in the Recaman's Sequence is 0, 1, 3, 6, 2, 7, 13, 20, 12, 21, 11, 22, 10, 23, 9 ...
Given k, your task is to calculate a
k.
Input
The input consists of several test cases. Each line of the input contains an integer k where 0 <= k <= 500000.
The last line contains an integer −1, which should not be processed.
Output
For each k given in the input, print one line containing a k to the output.
Sample Input
Sample Output
打表输出即可。