b***y 发帖数: 2799 | 1 ☆─────────────────────────────────────☆
ilvch (From here to eternity) 于 (Sat Jul 12 23:45:03 2008) 提到:
一个code snippet:
while (a!=1){
if even(a) a=a/2;
else a=3*a+1;
}
问这个程序会不会在某种输入(a>0)时陷入死循环?
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repast (xebec) 于 (Sun Jul 13 00:11:47 2008) 提到:
这个是一 countable markov chain, but definitive,
u need to judge if it is recurrent/transient for every initial state.
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goodbug (好虫) 于 (Sun Jul 13 00:14:22 2008) 提到:
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