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| if a = 0 and b = 0?? | gooooooogol | 1420. Integer-Valued Complex Division | 11 Mar 2025 10:55 | 2 |
if a = 0 and b = 0 => r = 0 and q every complex number => count solation equation = infinity |
| WA 14 ???? Help | Ostap Korkuna | 1420. Integer-Valued Complex Division | 3 Feb 2017 23:50 | 4 |
I can't understand what is wrong? Maby something with calculations and rounding??? Can anyone help me? Thanks
[code deleted]
Edited by moderator 22.02.2006 00:48 correst your x and y to:
[code deleted]
Edited by author 21.11.2005 04:45
Edited by moderator 22.02.2006 00:49 Can you tell me how to solve this problem?? Утверждение: задача эквивалентна следующей: нужно найти все комплексные q с целыми коэффициентами, удовлетворяющие |a-bq|<|b|.
Если |b|=0, то решений нет
Иначе |b|>0. Тогда условие эквивалентно |a/b - z|<1. Пусть a=a1+b1i, b=a2+b2i, q=q1+q2i. Тогда получим |alfa/gamma-q1+i(beta/gamma+q2)|<1 <=> ((alfa-gamma*q1)/gamma)^2+((beta+gamma*q2)/gamma)^2<1, где gamma=a2*a2+b2*b2, alfa=(a1*a2+b1*b2)/gamma, beta=i(a2*b1-a1*b2)/gamma.
Теперь просто можно пройтись по всем q1 и q2 (они меняются от -1+alfa/gamma до 1+alfa/gamma и от -1-beta/gamma до 1-beta/gamma) и проверить условие. |
| To ACers. | AlMag | 1420. Integer-Valued Complex Division | 17 Jan 2013 23:12 | 4 |
Can you generate me some tests with answers?
I'd like to check my program. Put R+,Q+. Try this:
1000000 1000000
1000000 1000000
1
1000000 1000000
999999 1000000
3
1000000 0
1 1000000
2
I think that answer on the last test must be 3.
(1+1000000i)*(-i)+i=1000000
(1+1000000i)*(1-i)-1-999999i=1000000
(1+1000000i)*0+1000000=1000000 Some random tests:
21 56
32 45
3
90 87
45 23
4
234 876
129 623
2
12345 65
8967 1345
3
4563 897
156 734
4
4 6
7 8
3 |
| q and r real ? | Lifanov | 1420. Integer-Valued Complex Division | 24 Aug 2008 04:20 | 3 |
Or too complex ?
What q,r for test in example ? All are complex!
in example:
q1=-2i r1=2
q2=-3i r2=-3 Complex, but with integer components |
| Always wa6,is there somebody who knows some tests | Vukasin | 1420. Integer-Valued Complex Division | 25 Jun 2008 23:42 | 1 |
I always get wa6.Is there anybody who knows what that test is?
Edited by author 25.06.2008 23:44 |
| About WA4 | Kollekcioner[Vologda, VML1] | 1420. Integer-Valued Complex Division | 7 Jul 2007 22:48 | 1 |
About WA4 Kollekcioner[Vologda, VML1] 7 Jul 2007 22:48 If you have a WA4 you may take in account that q = 0+0i too is an answer. Though I don't understand why |
| What mean |b| for complex | Dembel {AESC USU} | 1420. Integer-Valued Complex Division | 20 Oct 2006 21:12 | 2 |
what mean |b| for complex?
for example:
b=7+0i |b|=?
b=7-2i |b|=?
b=-2i |b|=?
Edited by author 20.10.2006 19:00
b=x+y*i
|b|=Sqrt(x*x+y*y) |
| i did not understand this problem/ help me please | +FAMAS+ | 1420. Integer-Valued Complex Division | 8 Feb 2006 23:56 | 1 |
12 0
0 5 - what this
and why answer = 2 |
| Please help me! | Dzmitry | 1420. Integer-Valued Complex Division | 31 Dec 2005 19:30 | 1 |
Please, help me with this problem. At first, when I saw this problem, I thought that it's very easy, but then... My solution #1:
[code deleted]
But at test #6 time isn't enough.
My solution #2:
[code deleted]
And test #6 again. Please, I can't find the error. Maybe does anybody know this test. Thanks for any information.
Edited by moderator 22.02.2006 00:50 |
| Brute Force can AC in 0.015sec | Yu Yuanming | 1420. Integer-Valued Complex Division | 24 Dec 2005 13:43 | 1 |
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