Cody

Problems

1 – 50 of 73
Problem Title
Likes
Solvers
Difficulty

Problem 1927. Find nth maximum

Created by: Awadhesh Srivastava

Tags number theory, n th max

4

384

Problem 44319. Write c^3 as sum of two squares a^2+b^2

Created by: Mehmet OZC

Tags number theory, cody5

2

283

Problem 2733. Evil Number

Created by: Jan Orwat

Tags easy, number theory, oeis

3

207

Problem 1826. Find vampire numbers

Created by: Andrew Newell

Tags factors, number theory

9

148

Problem 42865. Find the sum of n squares

Created by: William Mitchell

Tags number theory

2

143

Problem 2734. N-th Odious

Created by: Jan Orwat

Tags number theory, oeis, pop series

2

140

Problem 2593. Polite numbers. N-th polite number.

Created by: Jan Orwat

Tags number theory, a138591

2

128

Problem 2595. Polite numbers. Politeness.

Created by: Jan Orwat

Tags number theory, oeis

6

120

Problem 1771. Polygonal numbers

Created by: Jan Orwat

Tags number theory, sequence, polygonal

5

104

Problem 43130. Nth root

Created by: Abhishek Jain

Tags numbers, root, number theory

2

85

Problem 44289. Find two triangular numbers whose sum is input.

Created by: Mehmet OZC

Tags number theory, triangular numbers

2

74

Problem 656. Calculate Euler's phi function

Created by: Freddy

Tags math, basic matlab, factors

1

72

Problem 1804. Fangs of a vampire number

Created by: Andrew Newell

Tags factors, number theory

4

63

Problem 43082. Reverse digits of a number

Created by: Mohammad Haghighat

Tags math, numbers, basic matlab

2

55

Problem 2738. Sideways sum

Created by: Jan Orwat

Tags easy, number theory, pop series

1

46

Problem 44068. The number of trailing zero digit of a factorial

Created by: Jihye Sofia Seo

Tags integer, number theory, factorial

3

46

Problem 2735. Binary Neighbourhood

Created by: Jan Orwat

Tags number theory, pop series

2

45

Problem 1825. Find all vampire fangs

Created by: Andrew Newell

Tags factors, number theory

2

44

Problem 2848. Digital Neighbourhood

Created by: Jan Orwat

Tags number theory, pop series

2

40

Problem 44748. Amicable numbers

Created by: cdeliu

Tags number theory, divisors

1

38

Problem 46305. find the value

Created by: Maryam HCTRAK Alhebsi

Tags number theory

1

38

Problem 44229. How brilliant are you?

Created by: James

Tags factors, number theory, brilliant

3

37

Problem 46287. find the answer

Created by: Maryam HCTRAK Alhebsi

Tags number theory

1

37

Problem 2797. modular arithmetic

Created by: rifat

Tags number theory

2

35

Problem 45189. Double Factorial

Created by: Mehmet OZC

Tags number theory, factorial, double factorial

2

34

Problem 44065. Number of even divisors of a given number

Created by: Jihye Sofia Seo

Tags factor, integer, number theory

2

34

Problem 2370. Fermat's last theorem - again

Created by: rifat

Tags number theory

1

28

Problem 44230. I'm going to enjoy watching you calculate, Mr Anderson

Created by: James

Tags number theory, phone numbers, agent smith

2

28

Problem 46000. Compute the harmonic numbers

Created by: ChrisR

Tags number theory

4

26

Problem 2369. Tribute to Ramanujan

Created by: rifat

Tags number theory

1

20

Problem 47458. Perfect number

Created by: Soobok

Tags number theory

1

19

Problem 46639. Transform a Decimal number into a Septimal number

Created by: Syed Shahed

Tags numbers, number theory

1

19

Problem 45224. Wythoff Sequence

Created by: Asif Newaz

Tags number theory, sequence, oeis

2

18

Problem 42888. Frobenius McNugget Factorization

Created by: Ned Gulley

Tags number theory, factorization

14

16

Problem 45272. Pseudo-vampire number

Created by: Asif Newaz

Tags numbers, number theory, sequence

2

16

Problem 47798. Check if the input is a balanced prime

Created by: Mehmet OZC

Tags primes, number theory, balanced prime

1

15

Problem 43179. Red and green towers

Created by: Giovanni Mottola

Tags arithmetic, number theory

1

14

Problem 45964. Compute the nth Pythagorean prime

Created by: ChrisR

Tags primes, pythagoras, number theory

0

14

Problem 47803. Check if the input is a strong prime

Created by: Mehmet OZC

Tags primes, number theory, strong prime

0

13

Problem 45274. Fangs of pseudo-vampire number

Created by: Asif Newaz

Tags number theory, vampire

1

13

Problem 46054. Count trailing zeros in a primorial

Created by: ChrisR

Tags primes, number theory, primorial

3

13

Problem 47808. Check if the input is an interprime

Created by: Mehmet OZC

Tags primes, number theory, interprime

0

12

Problem 42831. Integer complexity

Created by: HH

Tags numbers, integer, number theory

2

12

Problem 45388. Gapful numbers

Created by: Asif Newaz

Tags numbers, number theory, time complexity

1

12

Problem 42889. Should Mr McNugget even get out of bed today?

Created by: James

Tags number theory, factorization, no nuggets for you!

1

11

Problem 45342. Sieve of Eratosthenes

Created by: Asif Newaz

Tags prime, numbers, number theory

2

11

Problem 45988. Evaluate the zeta function for real arguments > 1

Created by: ChrisR

Tags number theory, zeta function, special functions

1

11

Problem 46046. Determine whether a number is a cluster prime

Created by: ChrisR

Tags primes, number theory

2

11

Problem 46003. Compute Khinchin's constant

Created by: ChrisR

Tags numbers, number theory

2

10

Problem 46016. Determine digits of the Copeland-Erdos constant

Created by: ChrisR

Tags numbers, number theory

3

10
1 – 50 of 73