Guess One Character

constructive algorithms, implementation, interactive

Superultra's Favorite Permutation

constructive algorithms, greedy, math, number theory

Library of Magic

binary search, constructive algorithms, divide and conquer, interactive, math, number theory

Reverse the Rivers

binary search, constructive algorithms, data structures, greedy

Peak Productivity Forces

constructive algorithms

Monster

binary search, brute force, constructive algorithms, greedy, implementation, math, ternary search

Alya and Permutation

bitmasks, constructive algorithms, math

Everyone Loves Tres

constructive algorithms, greedy, math, number theory

Sakurako and Water

brute force, constructive algorithms, greedy

Sakurako and Kosuke

constructive algorithms, implementation, math

Balanced

constructive algorithms, data structures, greedy, implementation, math

Genokraken

constructive algorithms, data structures, graphs, greedy, implementation, interactive, trees, two pointers

Medians

constructive algorithms, greedy, implementation, math

Penchick and Even Medians

binary search, constructive algorithms, interactive, probabilities

Penchick and BBQ Buns

constructive algorithms, math, number theory

Penchick and Modern Monument

constructive algorithms, dp, greedy, math

Minimise Oneness

combinatorics, constructive algorithms, games, math

A Gift From Orangutan

constructive algorithms, greedy, math, sortings

Palindrome Everywhere

constructive algorithms, graphs, greedy

Common Generator

brute force, constructive algorithms, math, number theory

Cool Graph

constructive algorithms, data structures, dfs and similar, dsu, graphs, greedy, trees

Replacement

constructive algorithms, games, strings

Alice's Adventures in Cards

constructive algorithms, data structures, dp, graphs, greedy, implementation, ternary search

Action Figures

binary search, brute force, constructive algorithms, data structures, greedy, implementation

Black Cells

binary search, brute force, constructive algorithms, greedy

Perpendicular Segments

constructive algorithms, geometry, greedy, math

Choose Your Queries

constructive algorithms, dfs and similar, dp, graphs, greedy, trees

Buying Lemonade

binary search, constructive algorithms, sortings

C+K+S

constructive algorithms, dfs and similar, graphs, greedy, hashing, implementation, strings

Concatenation of Arrays

constructive algorithms, greedy, math, sortings

Billetes MX (Easy Version)

2-sat, binary search, combinatorics, constructive algorithms, dfs and similar, dsu, graphs

Asesino (Hard Version)

constructive algorithms, dp, interactive

Asesino (Easy Version)

binary search, brute force, constructive algorithms, implementation, interactive

Bus to Pénjamo

constructive algorithms, greedy, implementation, math

Adjust The Presentation (Hard Version)

constructive algorithms, data structures, greedy, implementation, sortings

Adjust The Presentation (Easy Version)

constructive algorithms, greedy

Password Cracking

constructive algorithms, interactive, strings

Battle for Survive

constructive algorithms, greedy, math

Zhan's Blender

constructive algorithms, math

Sakurako's Exam

brute force, constructive algorithms, greedy, math

Dora's Paint

brute force, combinatorics, constructive algorithms, graphs, implementation

Iris and Game on the Tree

constructive algorithms, dfs and similar, games, graphs, greedy, trees

Simple Palindrome

combinatorics, constructive algorithms, greedy, math

Turtle and Good Pairs

constructive algorithms, greedy, sortings, strings

Removals Game

constructive algorithms, games

Distanced Coloring

constructive algorithms, implementation, math

Longest Max Min Subsequence

brute force, constructive algorithms, data structures, greedy, implementation

Generate Permutation

constructive algorithms

Card Game

brute force, constructive algorithms, implementation

Perform Operations to Maximize Score

binary search, brute force, constructive algorithms, greedy, implementation

Minimize Equal Sum Subarrays

constructive algorithms, math, number theory

Find K Distinct Points with Fixed Center

constructive algorithms, implementation, math

Even Positions

constructive algorithms, data structures, greedy

Make Three Regions

constructive algorithms, two pointers

Squaring

brute force, constructive algorithms, greedy, implementation, math, number theory

Fortnite

combinatorics, constructive algorithms, games, greedy, hashing, interactive, math, number theory, strings

Stardew Valley

constructive algorithms, dfs and similar, graphs, trees

Funny Game

constructive algorithms, dsu, graphs, greedy, math, number theory, trees

Fun Game

bitmasks, constructive algorithms, greedy, math

Diverse Game

constructive algorithms, greedy, implementation

Dyn-scripted Robot (Easy Version)

brute force, chinese remainder theorem, constructive algorithms, math, number theory

Xor-Grid Problem

bitmasks, constructive algorithms, dp, implementation

Parity and Sum

constructive algorithms, greedy

Novice's Mistake

brute force, constructive algorithms, implementation, math, strings

Gorilla and Permutation

constructive algorithms, math

Only Pluses

brute force, constructive algorithms, greedy, math, sortings

Grid Game

constructive algorithms, games, graph matchings, greedy, interactive

Grid Reset

constructive algorithms, greedy, implementation

Coloring Game

constructive algorithms, dfs and similar, games, graphs, greedy, interactive

Prime XOR Coloring

bitmasks, constructive algorithms, graphs, greedy, math, number theory

Absolute Zero

constructive algorithms, greedy, math

AND Reconstruction

bitmasks, constructive algorithms, greedy

Array Craft

constructive algorithms, greedy

Increasing Sequence with Fixed OR

bitmasks, constructive algorithms, greedy

Magic Trick II

constructive algorithms, implementation, sortings

Strange Splitting

constructive algorithms

Swap Dilemma

constructive algorithms, data structures, divide and conquer, greedy, math, sortings

Corner Twist

constructive algorithms, greedy, implementation, math

Array Divisibility

constructive algorithms, math

Turtle and Multiplication

constructive algorithms, dfs and similar, graphs, number theory

Turtle and an Incomplete Sequence

bitmasks, brute force, constructive algorithms, greedy, implementation, math

Permutation of Rows and Columns

constructive algorithms, data structures, greedy, hashing, implementation, math, matrices, sortings

Sofia and the Lost Operations

constructive algorithms, greedy

Kostyanych's Theorem

brute force, constructive algorithms, graphs, interactive

Manhattan Triangle

binary search, constructive algorithms, data structures, geometry, implementation, two pointers

Fixing a Binary String

bitmasks, brute force, constructive algorithms, dp, greedy, hashing, strings

Earning on Bets

binary search, combinatorics, constructive algorithms, number theory

Manhattan Permutations

constructive algorithms, data structures, greedy, implementation, math

Alice and Books

constructive algorithms, greedy, sortings

Tensor

constructive algorithms, graphs, interactive

Binary Colouring

bitmasks, constructive algorithms, greedy, math

Ingenuity-2

constructive algorithms, greedy, implementation

Cat, Fox and Double Maximum

constructive algorithms, greedy, implementation, math, sortings

Arithmancy (Medium)

constructive algorithms, interactive, probabilities, strings

Arithmancy (Easy)

brute force, constructive algorithms, interactive, strings

Exact Neighbours (Hard)

constructive algorithms

Exact Neighbours (Medium)

constructive algorithms

Exact Neighbours (Easy)

constructive algorithms

Balanced Unshuffle (Hard)

constructive algorithms, trees

Balanced Unshuffle (Medium)

brute force, constructive algorithms, trees