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## Discussion of Problem 1007. Code Words

What's the original sequence of 1101? HaHa,that's funny,isn't it ?
Posted by Richard 20 Apr 2008 20:35
1101
Both 1111 and 1001 is right.
But what's the "correct answer" ?
Who got Ac ? Tell me...
Re: What's the original sequence of 1101? HaHa,that's funny,isn't it ?
Posted by Anisimov Dmitry 10 Jun 2008 16:08
1111 is not correct
for input 1101

Edited by author 10.06.2008 16:09
Re: What's the original sequence of 1101? HaHa,that's funny,isn't it ?
Posted by Husan 18 Aug 2008 23:49
I think  that it must be correct answer too.
Re: What's the original sequence of 1101? HaHa,that's funny,isn't it ?
Posted by sun 20 Aug 2008 14:10
In the problem there are words " one of the following modifications to a word may occur",I think it hope to means
that the following three modification one and only one must
occur.So ,1111 is a correct answer!because none of the three
modifications occur.
Husan wrote 18 August 2008 23:49
I think  that it must be correct answer too.
Re: What's the original sequence of 1101? HaHa,that's funny,isn't it ?
Posted by sun 20 Aug 2008 15:08
The number is interesting.If the first number is 1,the last one must equal to 1;and the ...
Be breaf,OK;
char *a=new char[n];
int the a[n],a[1] must equal to a[n-1]
a[2] must equal to a[n-2]
...
so if 1101,you can't decide wheather a[1] is changed(then answer is 1001) or a[2] is changed(then answer is 1111) .
In this case 0001 also has two origner number 0000 or 1001
.....
Re: What's the original sequence of 1101? HaHa,that's funny,isn't it ?
Posted by titan 17 Oct 2008 05:56
in my AC prog, the sequence is right to left

therefor in 1101 the order is: first digit is 1 and second is 0 ,...
Re: What's the original sequence of 1101? HaHa,that's funny,isn't it ?
Posted by LiuKe 4 Nov 2008 18:47
1111 was not correct, because you can only change '1' to '0', can not change'0' to 1.(as the problem description said, maybe a '0' was replaced by '1').
So the Only Correct answer is 1001.