[Archive!] Pure mathematics, physics, chemistry, etc.: brain-training problems not related to trade in any way - page 156
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это не верное решение
Why is that?
Просто сложите монитор по линиям изгиба ))
Well, I did ))
let's go from twelve left to right:
1. Decompose 12 into 2 and 10, all right.
2. 7 added to 2 = 9 is correct.
3. 9 decompose by 1 and 8 is correct.
4. 8 decompose into 3 and 5 correctly.
5. 10 decompose into 4 and 6 correctly.
6. 3+4=7.
7. 6+5=11.
8.1+11=12.
Damn right.
решение верное, но хотелось бы получить его аналитически, а не подбором
It's hardly one.
хм..
Правильно?
PS: там еще 23 варианта осталось.
Well, how long did it take the computer to calculate that?
С направлениями всё правильно, а12 слева направо, дальше понятно
круто блин
Nah... I don't get it :) Draw it?
Не.. мне непонятно :) Нарисуй?
Is this a joke?
ну и как долго комп это высчитывал?
You got that right. As someone who was not trained in higher mathematics, I went straight to the bottom.
26 minutes Atom330 counted.
if (($a1+$a2 == 12) &&
($a3+$a4 == 12) &&
(($a9+$a5 == $a1) ||($a9+$a1 == $a5) || ($a1+$a5==$a9)) &&
(($a11+$a6 == $a2) ||($a11+$a2 == $a6) || ($a2+$a6==$a11)) &&
(($a9+$a7 == $a3) ||($a9+$a3 == $a7) || ($a3+$a7==$a9)) &&
(($a11+$a8 == $a4) ||($a11+$a4 == $a8) || ($a4+$a8==$a11)) &&
(($a7+$a8 == $a10) ||($a7+$a10 == $a8) || ($a8+$a10==$a7)) &&
(($a5+$a6 == $a10) ||($a5+$a10 == $a6) || ($a10+$a6==$a5)) ){
print "$a1,$a2,$a3,$a4,$a5,$a6,$a7,$a8,$a9,$a10,$a11\n";
}
That's the condition, the rest is overkill.
Все верно поняли. я как человек высшей математике не обучавшийся пошел влоб.
26 минут Атом330 считал.
if (($a1+$a2 == 12) &&
($a3+$a4 == 12) &&
(($a9+$a5 == $a1) ||($a9+$a1 == $a5) || ($a1+$a5==$a9)) &&
(($a11+$a6 == $a2) ||($a11+$a2 == $a6) || ($a2+$a6==$a11)) &&
(($a9+$a7 == $a3) ||($a9+$a3 == $a7) || ($a3+$a7==$a9)) &&
(($a11+$a8 == $a4) ||($a11+$a4 == $a8) || ($a4+$a8==$a11)) &&
(($a7+$a8 == $a10) ||($a7+$a10 == $a8) || ($a8+$a10==$a7)) &&
(($a5+$a6 == $a10) ||($a5+$a10 == $a6) || ($a10+$a6==$a5)) ){
print "$a1,$a2,$a3,$a4,$a5,$a6,$a7,$a8,$a9,$a10,$a11\n";
}
Это условие, остальное перебором.
I've done the math on a calculator and your computer is about 55384 times faster than me, so it probably hasn't taken time for a smoke break, sleep, lunch, study, etc.