Question

Number of strings with one element as the most common element

score 311 · Answer 1 · 2020-07-19 04:49:48

311

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Number of strings with one element as the most common element

Published on 19 Jul 2020 - 4:49

score 1k · Answer 2 · 2020-07-26 17:13:52

1k

Views

USAMO 2017 -TSTST P2: Which words can Ana pick?

Published on 26 Jul 2020 - 17:13

score 1k · Answer 3 · 2020-07-26 19:01:57

1k

Views

How many distinct permutations of the string "NADAMADRID" have the word DAM appearing in them?

Published on 26 Jul 2020 - 19:01

score 65 · Answer 4 · 2026-03-25 19:15:59

65

Views

Given an automatic sequence, what monoid endomorphisms fix the corresponding morphic word?

Published on 25 Mar 2026 - 19:15

score 438 · Answer 5 · 2026-03-26 07:04:07

438

Views

Number of binary strings of length $n$ satisfying specific (ad-hoc) conditions

Published on 26 Mar 2026 - 7:04

score 59 · Answer 6 · 2026-03-25 21:51:33

59

Views

How to reduce $f(k, n)$ to $\operatorname{fibonacci}(n)$?

Published on 25 Mar 2026 - 21:51

score 57 · Answer 7 · 2026-03-26 00:06:14

57

Views

How many sequences with $k$ different values less than $d$?

Published on 26 Mar 2026 - 0:06

score 132 · Answer 8 · 2026-03-26 09:30:50

132

Views

Finitely presented monoid with non-solvable word problem

Published on 26 Mar 2026 - 9:30

score 1.4k · Answer 9 · 2026-03-26 09:57:30

1.4k

Views

How many rhymes are possible in a 10 lines poem?

Published on 26 Mar 2026 - 9:57

score 1.4k · Answer 10 · 2026-03-26 00:06:27

How many strings of length n can be constructed with 'a', 'b', and 'c', such that there is a maximum of one 'b' and two consecutive 'c's?

score 403 · Answer 11 · 2026-03-26 09:30:33

403

Views

Fine and Wilf's Theorem Proof Verification

Published on 26 Mar 2026 - 9:30

score 80 · Answer 12 · 2026-03-25 17:14:06

80

Views

Radix Ordering on Words

Published on 25 Mar 2026 - 17:14

score 136 · Answer 13 · 2026-03-25 18:41:13

136

Views

Can cyclic shifts of ABAB and ABBA be equal?

Published on 25 Mar 2026 - 18:41

score 158 · Answer 14 · 2026-02-23 09:32:13

158

Views

∀n ∈ N, ∃w1, w2, . . . , wn ∈ A+ such that w = w1w2 . . . wn and C(w) = C(wi) ∀i ∈ {1, . . . , n}

Published on 23 Feb 2026 - 9:32

score 1.5k · Answer 15 · 2026-03-26 00:22:29

1.5k

Views

What is the probability of finding a certain gene of length $m$ inside our random DNA chain?

Published on 26 Mar 2026 - 0:22

List Question

Number of strings with one element as the most common element

USAMO 2017 -TSTST P2: Which words can Ana pick?

How many distinct permutations of the string "NADAMADRID" have the word DAM appearing in them?

Given an automatic sequence, what monoid endomorphisms fix the corresponding morphic word?

Number of binary strings of length $n$ satisfying specific (ad-hoc) conditions

How to reduce $f(k, n)$ to $\operatorname{fibonacci}(n)$?

How many sequences with $k$ different values less than $d$?

Finitely presented monoid with non-solvable word problem

How many rhymes are possible in a 10 lines poem?

How many strings of length n can be constructed with 'a', 'b', and 'c', such that there is a maximum of one 'b' and two consecutive 'c's?

Fine and Wilf's Theorem Proof Verification

Radix Ordering on Words

Can cyclic shifts of ABAB and ABBA be equal?

∀n ∈ N, ∃w1, w2, . . . , wn ∈ A+ such that w = w1w2 . . . wn and C(w) = C(wi) ∀i ∈ {1, . . . , n}

What is the probability of finding a certain gene of length $m$ inside our random DNA chain?

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