Ayoub's function

binary search, combinatorics, greedy, math, strings

Non-zero

implementation, math

So Mean

interactive, math

Around the World

bitmasks, combinatorics, dfs and similar, dp, graphs, graphs, math, trees

Anu Has a Function

brute force, greedy, math

M-numbers

*special problem, dp, math

Food Buying

math

Array with Odd Sum

math

Same GCDs

math, number theory

Infinite Prefixes

math, strings

Obtain a Permutation

greedy, implementation, math

MEX maximizing

data structures, greedy, implementation, math

Product of Three Numbers

greedy, math, number theory

Collecting Coins

math

JOE is on TV!

combinatorics, greedy, math

Rin and The Unknown Flower

constructive algorithms, greedy, interactive, math

Chaotic V.

dp, graphs, greedy, math, number theory, trees

Even But Not Even

greedy, math, strings

Yet Another Meme Problem

math

Deadline

binary search, brute force, math, ternary search

Harry The Potter

brute force, constructive algorithms, dp, fft, implementation, math

LCC

data structures, math, matrices, probabilities

Madhouse (Hard version)

brute force, constructive algorithms, hashing, interactive, math

Madhouse (Easy version)

brute force, constructive algorithms, interactive, math

Fadi and LCM

brute force, math, number theory

Mezo Playing Zoma

math

New Year and Social Network

data structures, graph matchings, graphs, math, trees

New Year and Castle Construction

combinatorics, geometry, math, sortings

New Year and Permutation

combinatorics, math

Friends and Gifts

constructive algorithms, data structures, math

Candies Division

math

Minutes Before the New Year

math

Temporarily unavailable

implementation, math

Intergalactic Sliding Puzzle

combinatorics, constructive algorithms, math

Kirchhoff's Current Loss

math

Beingawesomeism

implementation, math

Cut and Paste

implementation, math

Santa's Bot

combinatorics, math, probabilities

New Year Garland

math

Cards

combinatorics, dp, math, number theory, probabilities

A and B

greedy, math

Let's Play the Words?

data structures, hashing, implementation, math

Beautiful Rectangle

brute force, combinatorics, constructive algorithms, data structures, greedy, math

Three Friends

brute force, greedy, math, sortings

Common Number

binary search, combinatorics, dp, math

Blocks

greedy, math

Suits

brute force, greedy, math

Xor on Figures

constructive algorithms, fft, math

Subset with Zero Sum

constructive algorithms, dfs and similar, graphs, math

Awesome Substrings

math, strings

Divide Points

constructive algorithms, geometry, math

Strange Device

constructive algorithms, interactive, math, sortings

Make Good

bitmasks, constructive algorithms, math

Interesting Subarray

constructive algorithms, greedy, math

Card Game

games, greedy, math

Equation

brute force, math

Invertation in Tournament

brute force, divide and conquer, graphs, math

Domino for Young

dp, greedy, math

Key Storage

combinatorics, math

Just Arrange the Icons

greedy, implementation, math

Game Relics

math, probabilities

Red-Blue Graph

dp, graphs, math, matrices, meet-in-the-middle

Decreasing Debts

constructive algorithms, data structures, graphs, greedy, implementation, math, two pointers

Diverse Matrix

constructive algorithms, greedy, math, number theory

Dice Tower

constructive algorithms, math

Competitive Programmer

chinese remainder theorem, math

Beautiful Mirrors

data structures, dp, math, probabilities

Beautiful Numbers

data structures, implementation, math, two pointers

Everyone is a Winner!

binary search, math, meet-in-the-middle, number theory

Sweet Problem

math

Xor-Set

bitmasks, divide and conquer, math

Infinite Fence

greedy, math, number theory

Obtain Two Zeroes

binary search, math

Heating

math

Divisor Set

divide and conquer, fft, greedy, math, number theory

Magic Stick

math

Two Rival Students

greedy, math

Payment Without Change

math

Changing Volume

math

Point Ordering

constructive algorithms, geometry, interactive, math

Send Boxes to Alice (Hard Version)

constructive algorithms, greedy, math, number theory, ternary search, two pointers

Send Boxes to Alice (Easy Version)

constructive algorithms, greedy, math, number theory, ternary search, two pointers

Sweets Eating

dp, greedy, math, sortings

Addition Robot

data structures, math, matrices

Divide The Students

binary search, greedy, math

Happy Birthday

math

The Feast and the Bus

brute force, constructive algorithms, greedy, math

Good Numbers (hard version)

binary search, greedy, math, meet-in-the-middle

Books Exchange (hard version)

dfs and similar, dsu, math

Books Exchange (easy version)

dsu, math

Yet Another Dividing into Teams

math

Grow The Tree

greedy, math, sortings

Integer Points

geometry, math

Good ol' Numbers Coloring

math, number theory

Running in Pairs

constructive algorithms, greedy, math

The Football Season

brute force, math, number theory

Pens and Pencils

math

Number Discovery

math

Tile Painting

constructive algorithms, math, number theory

Ivan the Fool and the Probability Theory

combinatorics, dp, math