OJ Board

Does anyone knows problemes in the arhive that use or can use LCA (Lowest common ancestor)? Or from other sites ...
Thanks

Can anyone give me some data tests so I can find my mistake? For exemple what should be the output for this test:
7
3 0
6 1
7 5
5 8
3 8
2 7
2 6
8
3 0
6 1
7 5
5 8
3 8
2 7
2 6
1 5
6
3 1
5 6
4 6
3 7
2 6
1 6
5
1 1
1 5
3 5
6 7
9 5
3
1 1
2 2
2 0
4
0 0
0 1000
500 501
1000 0
4
0 0
0 1000
500 499
1000 0
0 ...

Can anyone give me a url where is explained a multiplying algorithm of two big numbers in less then n1*n2 complexity? (where n1 and n2 are the number of digits of the numbers).

I get the same : output limit. I really don't know why but it seems like the test 5 has the case n=1 in witch the problem dosen't says what to print. If i don't print anything (if n=1) i still get output limit. What can be the problem?
pls help.

Yes, i figured it out.... I was using M_PI witch should be the pi constant (it probably works only in borland C, or i dont't know...) . But
where do i see the "reply sent back to me by the judge"? . It just shows Compilation error.

Finally, i got it: i can't use M_PI witch should be a constant in math.h (pi ) . Now i get WA .

I know about atan2, that was what i were actually using. I included <math.h>, but i awlys get compilation error. With my version of gcc, i don't. Can anyone tell me why this source gets compliation error?:
#include <math.h>
#include <stdlib.h>
#include <stdio.h>
#define nmax 10005
FILE *fin,*fout ...

I need to use atan(), that is in <math.h>. How can i complie a problem (i mean on the judge system) using the -lm option?.
thanks

I know about -lm, but how can I use this on the judge system? Can I put something like "-lm" at the "Comment" when i submit?
Thanks again.

I know how the solve the problem, at least i have the idea. the problem is that i have to use the function "atan2(y,x);" - that is in C. I must include "math.h", i know, i did that but i get complietion error. Please how can i use this function?.
Thanks.