Digit permutation puzzle
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Given two numbers a and b ,
Find all the numbers between them such that :
If x is number between a and b then digits in 2x are permutation of digits in x.
algorithms permutations puzzle
asked Nov 22 at 16:21
Jay Teli
196211
add a comment |
up vote
1
down vote
favorite
1
Given two numbers a and b ,
Find all the numbers between them such that :
If x is number between a and b then digits in 2x are permutation of digits in x.
algorithms permutations puzzle
asked Nov 22 at 16:21
Jay Teli
196211
Why can't you just cycle through all the numbers between a and b and check? What is the desired complexity?
– Todor Markov
Nov 22 at 17:14
Cannot loop so much .. a can be 1 and b can be 10 raised to 18. I wish to get ans in few seconds. Desired complexity is as best as it can get.
– Jay Teli
Nov 22 at 17:27
See oeis.org/A023086, and in particular see the link to blog.plover.com/math/dd.html.
– Peter Kagey
Nov 22 at 18:33
This is exactly what i was looking for. Can u post the link as ans. I’ll accept it as answer. Thank u so much
– Jay Teli
Nov 22 at 23:02
add a comment |
up vote
1
down vote
favorite
1
up vote
1
down vote
favorite
1
1
Given two numbers a and b ,
Find all the numbers between them such that :
If x is number between a and b then digits in 2x are permutation of digits in x.
algorithms permutations puzzle
asked Nov 22 at 16:21
Jay Teli
196211
Given two numbers a and b ,
Find all the numbers between them such that :
If x is number between a and b then digits in 2x are permutation of digits in x.
algorithms permutations puzzle
algorithms permutations puzzle
asked Nov 22 at 16:21
Jay Teli
196211
asked Nov 22 at 16:21
Jay Teli
196211
asked Nov 22 at 16:21
Jay Teli
196211
asked Nov 22 at 16:21
Jay Teli
196211
asked Nov 22 at 16:21
Jay Teli
196211
196211
Why can't you just cycle through all the numbers between a and b and check? What is the desired complexity?
– Todor Markov
Nov 22 at 17:14
Cannot loop so much .. a can be 1 and b can be 10 raised to 18. I wish to get ans in few seconds. Desired complexity is as best as it can get.
– Jay Teli
Nov 22 at 17:27
See oeis.org/A023086, and in particular see the link to blog.plover.com/math/dd.html.
– Peter Kagey
Nov 22 at 18:33
This is exactly what i was looking for. Can u post the link as ans. I’ll accept it as answer. Thank u so much
– Jay Teli
Nov 22 at 23:02
add a comment |
Why can't you just cycle through all the numbers between a and b and check? What is the desired complexity?
– Todor Markov
Nov 22 at 17:14
Cannot loop so much .. a can be 1 and b can be 10 raised to 18. I wish to get ans in few seconds. Desired complexity is as best as it can get.
– Jay Teli
Nov 22 at 17:27
See oeis.org/A023086, and in particular see the link to blog.plover.com/math/dd.html.
– Peter Kagey
Nov 22 at 18:33
This is exactly what i was looking for. Can u post the link as ans. I’ll accept it as answer. Thank u so much
– Jay Teli
Nov 22 at 23:02
Why can't you just cycle through all the numbers between a and b and check? What is the desired complexity?
– Todor Markov
Nov 22 at 17:14
Why can't you just cycle through all the numbers between a and b and check? What is the desired complexity?
– Todor Markov
Nov 22 at 17:14
Cannot loop so much .. a can be 1 and b can be 10 raised to 18. I wish to get ans in few seconds. Desired complexity is as best as it can get.
– Jay Teli
Nov 22 at 17:27
Cannot loop so much .. a can be 1 and b can be 10 raised to 18. I wish to get ans in few seconds. Desired complexity is as best as it can get.
– Jay Teli
Nov 22 at 17:27
See oeis.org/A023086, and in particular see the link to blog.plover.com/math/dd.html.
– Peter Kagey
Nov 22 at 18:33
See oeis.org/A023086, and in particular see the link to blog.plover.com/math/dd.html.
– Peter Kagey
Nov 22 at 18:33
This is exactly what i was looking for. Can u post the link as ans. I’ll accept it as answer. Thank u so much
– Jay Teli
Nov 22 at 23:02
This is exactly what i was looking for. Can u post the link as ans. I’ll accept it as answer. Thank u so much
– Jay Teli
Nov 22 at 23:02
add a comment |
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Why can't you just cycle through all the numbers between a and b and check? What is the desired complexity?
– Todor Markov
Nov 22 at 17:14
Cannot loop so much .. a can be 1 and b can be 10 raised to 18. I wish to get ans in few seconds. Desired complexity is as best as it can get.
– Jay Teli
Nov 22 at 17:27
See oeis.org/A023086, and in particular see the link to blog.plover.com/math/dd.html.
– Peter Kagey
Nov 22 at 18:33
This is exactly what i was looking for. Can u post the link as ans. I’ll accept it as answer. Thank u so much
– Jay Teli
Nov 22 at 23:02