520 - Append

All about problems in Volume 5. If there is a thread about your problem, please use it. If not, create one with its number in the subject.

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stcheung
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520 - Append

Post by stcheung » Sat Dec 30, 2006 10:50 pm

This problem is a bit vague. When it says "expressing the sequence Cw in the form CuCv" does it mean the Cu and Cv must use the same original pairs from Cw? In other words, Cu is the head of Cw while Cv is the tail of Cw? If so, does anyone have some sample output?

And is my following sample output correct (the number before : is my output for the next block of input)? THANKS
1:
0 a
1 1
0 b
3 3
3 3
3 2
0 c

1:
0 a
1 1
0 b
3 3
3 3
3 2
0 c

2:
0 a
0 a
0 a
0 a
3 3
0 c

2:
0 a
0 b
0 c
0 d
2 2
3 1
5 5

1:
0 a
0 b

0:
0 a

1:
0 a
1 1
0 b

0:
0 a
0 b
2 1

2:
0 a
1 1
0 b
1 1
0 c
1 1

Jan
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Re: 520 Append - Need clarification and also sample output

Post by Jan » Thu Mar 27, 2008 8:01 pm

stcheung wrote:This problem is a bit vague. When it says "expressing the sequence Cw in the form CuCv" does it mean the Cu and Cv must use the same original pairs from Cw? In other words, Cu is the head of Cw while Cv is the tail of Cw?
Yes.

And your cases are correct.

metaphysis
Experienced poster
Posts: 139
Joined: Wed May 18, 2011 3:04 pm

Re: 520 - Append

Post by metaphysis » Tue May 02, 2017 5:37 am

Jan is right. At first, I misunderstood the problem, so got WA two times.

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