Problems

1 – 19 of 19

Problem Title Likes Solvers Difficulty

Problem 509. Count photos

Created by: AMITAVA BISWAS

Tags combinatorics, basic matlab

417

Problem 47838. Count the ways pairs of parentheses can be matched correctly

Created by: ChrisR

Tags combinatorics, parentheses, special numbers

Problem 51820. Count unique orderings of vertices of a polygon

Created by: ChrisR

Tags combinatorics, permutations, sequence

Problem 44735. Aztec Diamond domino tilings

Created by: HH

Tags combinatorics, tiling

Problem 46551. Solve a ballot counting problem

Created by: ChrisR

Tags combinatorics

Problem 54020. Circle Division

Created by: HH

Tags combinatorics, division, circle

Problem 54390. That's not my hat!

Created by: Sourabh Warrier

Tags combinatorics, recursion

Problem 44066. Number of paths on a 3d grid

Created by: Jihye Sofia Seo

Tags math, combinatorics, programming

Problem 1463. Pascal's Matrix

Created by: Yaroslav

Tags math, matlab 101, combinatorics

319

Problem 1483. Number of paths on a grid

Created by: G K

Tags math, combinatorics, programming

Problem 58946. Count block fountains

Created by: ChrisR

Tags combinatorics, recursion, michael penn

Problem 52629. Count the ways to draw non-intersecting chords between points on a circle

Created by: ChrisR

Tags combinatorics, geometry, sequence

Problem 44072. Number of paths on a n-dimensional grid

Created by: Jihye Sofia Seo

Tags combinatorics, hypercube, grid

Problem 37. Pascal's Triangle

Created by: Cody Team

Tags math, combinatorics

4356

Problem 604. Next lexicographic - permutation

Created by: Muthu Annamalai

Tags combinatorics, permutations

Problem 56448. nth permutation of 11...100...0

Created by: Scott Stetson

Tags combinatorics, permutations

Problem 44787. What can you get for exactly amount of money(harder)

Created by: li haitao

Tags combinatorics, search, knapsack problem

Problem 52729. Easy Sequences 21: Combinatorial Summations

Created by: Ramon Villamangca

Tags easy, combinatorics, number theory

Problem 45303. Combinatorics - 01

Created by: Asif Newaz

Tags combinatorics, logic

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Problems

Problem 509. Count photos

Problem 47838. Count the ways pairs of parentheses can be matched correctly

Problem 51820. Count unique orderings of vertices of a polygon

Problem 44735. Aztec Diamond domino tilings

Problem 46551. Solve a ballot counting problem

Problem 54020. Circle Division

Problem 54390. That's not my hat!

Problem 44066. Number of paths on a 3d grid

Problem 1463. Pascal's Matrix

Problem 1483. Number of paths on a grid

Problem 58946. Count block fountains

Problem 52629. Count the ways to draw non-intersecting chords between points on a circle

Problem 44072. Number of paths on a n-dimensional grid

Problem 37. Pascal's Triangle

Problem 604. Next lexicographic - permutation

Problem 56448. nth permutation of 11...100...0

Problem 44787. What can you get for exactly amount of money(harder)

Problem 52729. Easy Sequences 21: Combinatorial Summations

Problem 45303. Combinatorics - 01