Modular Tetration

combinatorics, math, number theory

Exchange Queries

combinatorics, data structures, greedy

Maximum OR Popcount

binary search, bitmasks, brute force, data structures, greedy

Game on Array

games, greedy

Rabbits

constructive algorithms, dp, greedy, implementation

Multiple Construction

constructive algorithms

Shortest Increasing Path

constructive algorithms, greedy

Bubble Sort

brute force, combinatorics, dp

Yet Another MEX Problem

brute force, constructive algorithms, data structures, divide and conquer, greedy, hashing

Max Sum OR (Hard Version)

bitmasks, constructive algorithms, divide and conquer, greedy

Max Sum OR (Easy Version)

bitmasks, constructive algorithms, divide and conquer, greedy, trees

Wrong Binary Search

binary search, constructive algorithms

Merging the Sets

greedy, implementation

Equal Occurrences

brute force, greedy, implementation

Cost of Coloring

combinatorics, divide and conquer, dp, fft, math

Long Journey

dfs and similar, divide and conquer, dp, graphs, greedy, math, matrices, number theory

Predicting Popularity

binary search, data structures, greedy, sortings

Inversion Value of a Permutation

constructive algorithms, dfs and similar, dp

Monocarp's String

binary search, greedy, strings

Deck of Cards

greedy, implementation

Candies for Nephews

math

Bracket Groups

brute force, constructive algorithms, dp, string suffix structures, strings

Looking at Towers (difficult version)

combinatorics, data structures, dp

Looking at Towers (easy version)

combinatorics, dp

Price Tags

brute force, dp, math

Non-Descending Arrays

combinatorics, dp, math

Maximum Cost Permutation

constructive algorithms, greedy

Cut the Array

brute force, constructive algorithms, math, number theory

Increasing Xor

bitmasks, data structures, math

Make Good

constructive algorithms, greedy, math, strings

Inversion Graph Coloring (Hard Version)

binary search, combinatorics, data structures, dp, two pointers

Inversion Graph Coloring (Easy Version)

combinatorics, data structures, dp, greedy, two pointers

Max Tree

constructive algorithms, dfs and similar, graphs, greedy

Discounts

greedy, sortings, two pointers

All Lengths Subtraction

brute force, two pointers

Color the Tree

*special problem

Merging Vertices in a Graph

*special problem, dfs and similar, dsu, graphs

Good Robot Paths

*special problem, data structures, geometry, sortings

Array Reduction

*special problem, greedy

Perfect Cut

*special problem, dp, greedy

Avoid Minimums

*special problem, greedy, math

Minimum on Subarrays

*special problem, brute force

Games

*special problem, greedy

Furniture Store

*special problem, implementation

Sum Minimisation

number theory

Prime Gaming (Hard Version)

bitmasks, combinatorics, dp, probabilities

Prime Gaming (Easy Version)

bitmasks, combinatorics, dp

A Cruel Segment's Thesis

data structures, greedy, sortings

Ultimate Value

data structures, games, greedy

Another Divisibility Problem

constructive algorithms, math, number theory

Shift Sort

greedy, sortings

Cake Collection

greedy

Maple and Multiplication

greedy, math

Ode to the Bridge Builder

constructive algorithms, geometry

Determinant Construction (Hard Version)

brute force, constructive algorithms, math, matrices, number theory

Determinant Construction (Easy Version)

brute force, constructive algorithms, math, matrices, number theory

Antiamuny and Slider Movement

brute force, combinatorics, implementation, math, sortings

Maple and Tree Beauty (Hard Version)

bitmasks, brute force, dfs and similar, dp, fft, trees

Maple and Tree Beauty (Easy Version)

brute force, dfs and similar, dp, graphs, trees

Antiamuny Wants to Learn Swap

data structures, greedy, two pointers

Cake Assignment

bitmasks, constructive algorithms, greedy

Cry Me a River

dfs and similar, dp, games, graphs

Prefix Maximum Invariance

binary search, combinatorics, data structures, sortings

Mexification

brute force, implementation, math

Replace with Occurrences

constructive algorithms

Maximum Even Sum

brute force, greedy, implementation, math

Fun Permutation

constructive algorithms, math, number theory

Collatz Conjecture

constructive algorithms, math

Like the Bitset

constructive algorithms, greedy, two pointers

In the Dream

greedy, math

To the Infinity

data structures, hashing, math, trees

Beyond the Palindrome (Hard Version)

combinatorics, dp, math, number theory

Beyond the Palindrome (Easy Version)

combinatorics, dp, math

From the Unknown (Hard Version)

brute force, constructive algorithms, interactive, math

From the Unknown (Easy Version)

constructive algorithms, interactive, math

By the Assignment

binary search, bitmasks, combinatorics, dfs and similar, dsu, graphs, math

For the Champion

constructive algorithms, interactive, math

Against the Difference

data structures, dp

Permutation Oddness

combinatorics, dp, math

Power Boxes

constructive algorithms, dp, implementation, interactive

Sliding Tree

constructive algorithms, dfs and similar, greedy, implementation, trees

Even Larger

brute force, greedy, implementation

Add 0 or K

constructive algorithms, math, number theory

Painting With Two Colors

constructive algorithms, implementation, math

Flint and Steel

data structures, dp, graphs

I Yearned For The Mines

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

Chicken Jockey

dp, greedy

The Nether

graphs, interactive

Villagers

greedy

Redstone?

brute force, data structures, implementation, math

Famous Choreographer

hashing, implementation, strings

Rada and the Chamomile Valley

dfs and similar, graphs, shortest paths

Arithmetics Competition

binary search, data structures, greedy, sortings, ternary search

From 1 to Infinity

binary search, dp, implementation, math

The Cunning Seller (hard version)

binary search, greedy, math

The Cunning Seller (easy version)

greedy, math

The Secret Number

math

Homework

brute force, implementation, strings

Sea, You & copriMe

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

Wafu!

bitmasks, brute force, data structures, dfs and similar, dp, math