OJ Board

I have had problems in logging on this forum.

I can't directly log on by clicking the button on the top.
Indeed I have to select to post a new post first ,and then a window appears and requires me to log on.

I think it is the problem that if I re-log on, it can't distinguish I have logged out last ...

Can the town number be outputed interchangeably ?

For example ,
1 6
3 7
4 9
5 7
8 3

Can it be (also sorted):
1 6
3 7
3 8
5 7
9 4

?

Or even need not be sorted ?

Hi, everybody,

What is the output of the followings ?

1

5
1 2
1 3
1 4
1 5
0

Can you tell me some more details ?
Since there is a restriction that it can only move by exchanging the position with the blank square .

Would anyone tell me how to solve the problem ?

what is the maximum of "positive integers" in the input ?
(width and height)

How can you see the content of the problem ?

Multiple input

http://acm.uva.es/problemset/minput.html

I think it's not the problem of spaces.Even with more than one space, they will be ignored automatically .

compile error

Here are the compiler error messages:

01524002_24.c: In function `int check(long unsigned int)':
01524002_24.c:9: implicit declaration of function `int ultoa(...)'

I have written a program dealing with strings.
These are the header files I have included:
<stdio.h> <stdlib.h> <string.h>

However when I use "ultoa" or "strtoul", the judge said that it was an error.

Can anyone answer my question ?


Moreover, the judge accepts "%ld" or "%u" ?

Thanks.

How to detect for eoln ?
Are there any pre-definied constants, e.g. Pi in C++ ?

Can I have Some special cases for it ?

I tried to use cin.getline for input. Surprisingly, it stops after the blank lines. Why is it ?

Should I just use cin and !cnt.good to terminate the program ?

What makes difference ?

1. Space is referred to the SHIFT Characters.
However, does the sequence remain the same each time?

[ SPACE --- > SHIFT DOWN --- > SHIFT UP] ?

2. "It should be initiated as "DOWN" at first."
How about if there is a shift down afterwards ?

e.g. 1011010110[shift down characters here]1011010110 ...