Code: Select all

`2.43 2.43`

Code: Select all

`5 skew`

However, most of the AC code returns

Code: Select all

`4 grid`

- Fri Aug 06, 2010 12:29 pm
- Forum: Volume 1 (100-199)
- Topic: 121 - Pipe Fitters
- Replies:
**36** - Views:
**3554**

By the way what's the output for this:
This input was inspired by the fact sqrt(2) = 1.41, so the answer should be .

However, most of the AC code returns

Code: Select all

`2.43 2.43`

Code: Select all

`5 skew`

However, most of the AC code returns

Code: Select all

`4 grid`

- Sun Jun 27, 2010 10:45 pm
- Forum: Volume 5 (500-599)
- Topic: 550 - Multiplying by Rotation
- Replies:
**7** - Views:
**4506**

@yiuyuho: you are right, the fact that L*(B^n-factor) is divisible by (B*factor-1) does not gurantee, that x -- the corresponding quotient -- is n digits long.

But my solution gets AC. The problem is erroneous, if somebody has a really correct solution, please post here your comments.

But my solution gets AC. The problem is erroneous, if somebody has a really correct solution, please post here your comments.

- Fri Jun 04, 2010 9:20 pm
- Forum: Volume 117 (11700-11799)
- Topic: 11785 - Hypercube
- Replies:
**1** - Views:
**2011**

Hey, I didn't check your code, but the thing is: there can be edges (i,j) such that either i < 0 or j < 0.

The answer is, of course, "NO".

The answer is, of course, "NO".

- Fri Apr 09, 2010 7:08 pm
- Forum: Volume 117 (11700-11799)
- Topic: 11755 - Table Tennis
- Replies:
**3** - Views:
**2580**

Input:
Output: 0.00000

Code: Select all

```
1
WWWWWLLLLLWWWWWLLLLLWWWWWLLLLLWWWWWLLLLL
1.000 0.000
```

- Sun Apr 04, 2010 12:01 pm
- Forum: Volume 116 (11600-11699)
- Topic: 11626 - Convex Hull
- Replies:
**5** - Views:
**4127**

The only tricky case I can think of is a rhombus:
output is the same. And I got it AC with upper envelope + lower envelope also.

Code: Select all

```
1
8
0 -2 Y
1 -1 Y
2 0 Y
1 1 Y
0 2 Y
-1 1 Y
-2 0 Y
-1 -1 Y
```

- Sat Mar 06, 2010 5:36 am
- Forum: Volume 115 (11500-11599)
- Topic: 11598 - Optimal Segments
- Replies:
**5** - Views:
**3437**

My algo is: value is 0, if the i-th cell is special, otherwise it is given in the input; sm = sm[i-1] + value , thus the weight of the segment [i,j] is calculated as follows: (1ULL << sm[j]-sm[i-1]); pref = pref[i-1] + (is_special ? 1 : 0); Now suppose (j,k) be such a state that we have optimally di...

- Wed Feb 10, 2010 7:00 pm
- Forum: Volume 113 (11300-11399)
- Topic: 11394 - Digit Blocks
- Replies:
**18** - Views:
**9713**

I solved it with multinomial coefficients -- i.e. without any DP except for a set to store some duplicating bitmasks. Got AC in 1.560. I now wonder how those fellows solve it in 0.000? We just enumerate all the bitmasks, and if the corresponding sum of digits is divisible by 5, we form all permutati...

- Mon Feb 01, 2010 3:12 pm
- Forum: Volume 117 (11700-11799)
- Topic: 11766 - Racing Car Computer
- Replies:
**2** - Views:
**1956**

It was *I* who was lying when I said that (a*,b**) uniquely defines the configuration. Obviously it does not.*

- Mon Feb 01, 2010 8:59 am
- Forum: Volume 117 (11700-11799)
- Topic: 11766 - Racing Car Computer
- Replies:
**2** - Views:
**1956**

I haven't solved the problem yet. Still, I have a few remarks: i-th car is definitely lying if a[i]+1+b[i] > n; every pair (a[i],b[i]) _uniquely_ defines the configuration of the cars Now, if a particular car -- say, j-th -- is definitely lying in the above sense, and i-th car's data is plausible, t...

- Sat Jan 23, 2010 5:43 pm
- Forum: Volume 105 (10500-10599)
- Topic: 10558 - A Brief Gerrymander
- Replies:
**6** - Views:
**5351**

1. Do Avenues run from South to North and Streets from West to East?

To put it simply, Avenues are vertical lines and Streets are horizontals, right?

2. "Riding" is a large rectangle we have obtained by S horizontal and A vertical cuts?

To put it simply, Avenues are vertical lines and Streets are horizontals, right?

2. "Riding" is a large rectangle we have obtained by S horizontal and A vertical cuts?

- Fri Jan 22, 2010 8:37 am
- Forum: Volume 106 (10600-10699)
- Topic: 10626 - Buying Coke
- Replies:
**23** - Views:
**16297**

I would rather say that

Code: Select all

`ones_left = original_money - 8*cokes_bought - 5*fives_left - 10*tens_left`

- Thu Jan 21, 2010 10:41 am
- Forum: Volume 117 (11700-11799)
- Topic: 11753 - Creating Palindrome
- Replies:
**8** - Views:
**4436**

Reversing the sequence and finding the length of its longest common subsequence with the original sequence. Th? answer is n-LCS. Now, LCS problem is still O(n^2). There is also a O(rlog(n)) algo, where r is the number of pairs (i,j) such that ai = bj...

- Tue Jan 19, 2010 8:52 pm
- Forum: Volume 117 (11700-11799)
- Topic: 11753 - Creating Palindrome
- Replies:
**8** - Views:
**4436**

All I can think of is a lazy DP: the minimum cost of making a palindrome of s[i:j] is stored in a map if the cost is <= K...

Of course this is still O(n^2), but I thought that K's being small will make up for this deficiency... Any ideas?

Of course this is still O(n^2), but I thought that K's being small will make up for this deficiency... Any ideas?

- Wed Jan 06, 2010 7:07 am
- Forum: Volume 116 (11600-11699)
- Topic: 11686 - Pick up sticks
- Replies:
**44** - Views:
**12213**

Now I see how that color stunt is helpful in dfs. In the sample input above one edge is given twice, so it is easy to mistake it for a cycle during dfs, if one doesn't use colors.

- Sun Jan 03, 2010 12:42 pm
- Forum: Volume 8 (800-899)
- Topic: 880 - Cantor Fractions
- Replies:
**24** - Views:
**18342**

I would like to strongly emphasize that UVa264 and UVa880 are not one and the same: for instance, for input
you would have and respectively.

Code: Select all

`7`

Code: Select all

`TERM 7 IS 1/4`

Code: Select all

`4/1`