Search found 11 matches

by lantimilan
Sat Jul 11, 2009 8:57 pm
Forum: Volume 1 (100-199)
Topic: 169 - Xenosemantics
Replies: 18
Views: 12334

Re: 169 - Xenosemantics

Anyone has additional testcases, or care to point to me some tricky interpretation of the problem?
Have matched all testcases here, and my code output for the last case agrees with El-Idioto.

Also for the following case:
abcabc-
#
#
The output should be
ab
bc
*
Correct?
by lantimilan
Mon Dec 10, 2007 6:01 pm
Forum: Volume 1 (100-199)
Topic: 150 - Double Time
Replies: 18
Views: 7876

Just be careful

Just got AC after three days struggle.
This problem takes extreme care, or maybe I am careless.

Check every boundary condition carefully, Feb 29, 1600, 1700, 2000 years, and when count from Dec 1899 to Jan 1900. Basically put some assert will help.
by lantimilan
Wed Dec 05, 2007 6:37 pm
Forum: Volume 1 (100-199)
Topic: 148 - Anagram checker
Replies: 31
Views: 7734

Clarification and TLE

First a clarification on the problem:
Each word can appear in the anagram at most once.
That is, given input
A
B
#
AA
#
there should be no output.
However, if the input is
A
A
B
#
AA
#
then the output should be
AA = A A
It is not clear from the problem statement whether a word can appear multiple ...
by lantimilan
Sat Dec 01, 2007 5:05 pm
Forum: Volume 1 (100-199)
Topic: 143 - Orchard Trees
Replies: 90
Views: 27100

Another speed up

For C++ users, someone told me that cin/cout are in general much slower, maybe 10x, than scanf/printf, so consider this if you still got TLE.
by lantimilan
Sat Dec 01, 2007 5:04 pm
Forum: Volume 1 (100-199)
Topic: 143 - Orchard Trees
Replies: 90
Views: 27100

TLE and WA

There are all too many TLE and WA complains about this problem.
For TLE, two improvements might be:
1. use a good polygon area computation routine, search mathworld.com for an idea
2. check points from minx to maxx only
I got several TLE because I forgot to cache triangle area values but did three ...
by lantimilan
Tue Nov 20, 2007 5:21 pm
Forum: Volume 101 (10100-10199)
Topic: 10157 - Expressions
Replies: 23
Views: 15410

bigint multiplication

I was unable to figure out the formula without multiplication. But I would like to confirm that the recurrence with O(n*d) multiplication still can get you to AC, but the trick is in integer multiplication.

I learned this from misof, who pointed out that you can use vector<int> to store large ...
by lantimilan
Tue Sep 20, 2005 9:46 am
Forum: Volume 7 (700-799)
Topic: 701 - The Archeologists' Dilemma
Replies: 43
Views: 35564

p701, solved but run in 2.531s

Since there a a number of peope get less than 0.010s to finish, there must be some better algorithm than bruth force on search exponent by
2n+1, 2n+2, ...

Will anyone please give a hint?

thanks
by lantimilan
Wed Aug 17, 2005 2:42 pm
Forum: Volume 1 (100-199)
Topic: 134 - Loglan-A Logical Language
Replies: 45
Views: 8858

Some fine points

1. There is BAD formed words, words that are NOT in the grammar. This is very unfortunate because the problem statement says "you can assume all words will be correctly formed". I checked this by an assertion which catches bad words.

2. There is NO upper case characters. So you don't have to worry ...
by lantimilan
Fri Aug 12, 2005 9:29 am
Forum: Volume 1 (100-199)
Topic: 132 - Bumpy Objects
Replies: 38
Views: 10767

The WA output IS correct

Maniac's output is
Code:

UZJWU 13
YVTJTOOO 20

This is what should be output. Since the first polygon has point 1 point 2 and center form a triangle with 90deg, so segment(point 1, point 2) should be rejected as baseline. The same for the second polygon.

Also, about the format, I guess the magic ...
by lantimilan
Sat Mar 19, 2005 11:21 am
Forum: Volume 1 (100-199)
Topic: 118 - Mutant Flatworld Explorers
Replies: 68
Views: 20555

possible error source

Here are some pitfalls I encounter for p118, seemingly trivial problem

1. What you code do if enum type var was assigned soemthing off bounds, e.g.
enum direction { S,N,E,W }; and enum direction dir = 5; what is dir+1 then?

2. is your buffer large enough? instructions are length 100 at most ...
by lantimilan
Sat Mar 19, 2005 11:19 am
Forum: Volume 1 (100-199)
Topic: 118 - Mutant Flatworld Explorers
Replies: 68
Views: 20555

output by my AC program

11 12 W
14 4 W
5 17 E
20 4 E LOST
10 2 S
7 9 N
0 20 W LOST
3 5 N
6 0 E
16 6 W
9 4 W
0 18 W
5 3 E
6 15 N
7 12 W
6 9 S
4 5 W
0 19 W LOST
10 6 S
20 10 S
0 18 W
19 4 S
3 1 N
3 6 S
13 12 S
9 4 E
11 9 E
5 14 S
7 14 N
1 19 E
19 1 E
4 8 E
20 12 E LOST
4 4 S
20 11 E LOST
12 13 S
5 1 W
16 16 E
13 15 N
17 12 E ...

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