Adjusting Drones

binary search, brute force, data structures, dp, dsu, greedy, implementation, sortings

Billion Players Game

binary search, greedy, math, sortings, ternary search, two pointers

Meximum Array 2

constructive algorithms, greedy, implementation, math

Find the Last Number

binary search, bitmasks, constructive algorithms, interactive

Maximum GCD on Whiteboard

greedy, math, number theory

Batteries

brute force, constructive algorithms, graph matchings, graphs, interactive, math

The Ancient Wizards' Capes

brute force, greedy, implementation

Catshock

constructive algorithms, dfs and similar, graphs, trees, two pointers

No Cost Too Great (Easy Version)

greedy, implementation, math, number theory

Not Alone

dp, greedy

Symmetrical Polygons

constructive algorithms, geometry, greedy, implementation, sortings

Division Versus Addition

games, greedy, math

Triple Removal

data structures, greedy, math

Catching the Krug

games

Incremental Stay

greedy, implementation, math

Grid Counting

combinatorics, implementation, math

Incremental Path

data structures, hashing, implementation

Nezuko in the Clearing

binary search, math, ternary search

Hidden Knowledge of the Ancients

data structures, two pointers

Farmer John's Last Wish

binary search, data structures, math, number theory

Gravity Falls

greedy, implementation, sortings

Game on Array

games, greedy

Rabbits

constructive algorithms, dp, greedy, implementation

Max Sum OR (Easy Version)

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

Wrong Binary Search

binary search, constructive algorithms

Inversion Value of a Permutation

constructive algorithms, dfs and similar, dp

Monocarp's String

binary search, greedy, strings

Price Tags

brute force, dp, math

Non-Descending Arrays

combinatorics, dp, math

Inversion Graph Coloring (Easy Version)

combinatorics, data structures, dp, greedy, two pointers

Max Tree

constructive algorithms, dfs and similar, graphs, greedy

Avoid Minimums

*special problem, greedy, math

Minimum on Subarrays

*special problem, brute force

Ultimate Value

data structures, games, greedy

Maple and Tree Beauty (Easy Version)

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

Antiamuny Wants to Learn Swap

data structures, greedy, two pointers

Prefix Maximum Invariance

binary search, combinatorics, data structures, sortings

Mexification

brute force, implementation, math

For the Champion

constructive algorithms, interactive, math

Chicken Jockey

dp, greedy

The Nether

graphs, interactive

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

Unjust Binary Life

binary search, data structures, greedy, greedy, math, sortings, two pointers

Adjacent XOR

brute force, greedy

Arboris Contractio

data structures, graphs, greedy, trees

Interactive RBS (Easy Version)

binary search, bitmasks, constructive algorithms, interactive

Stay or Mirror

brute force, data structures, dp, greedy, sortings

Double Perspective

constructive algorithms, dp, dsu, graphs, greedy, sortings

Submedians (Easy Version)

binary search, data structures, dp, greedy, math

Sum of LDS

brute force, combinatorics, dp, greedy, math

Root was Built by Love, Broken by Destiny

combinatorics, dfs and similar, graphs, trees

Trip Shopping

games, greedy, sortings

Hamiiid, Haaamid... Hamid?

games, greedy

G-C-D, Unlucky!

math, number theory

Segments Covering

dp, math, probabilities

Make a Palindrome

greedy, sortings, two pointers

Subset Multiplication

constructive algorithms, greedy, math, number theory

Minimize Fixed Points

constructive algorithms, number theory

MEX Count

binary search, data structures, greedy, sortings, two pointers

Manhattan Pairs

constructive algorithms, geometry, greedy, math, sortings

Gangsta

data structures, divide and conquer, math, sortings

Yamakasi

binary search, brute force, data structures, greedy, two pointers

Sponsor of Your Problems

dp, greedy, implementation, strings

1709

implementation, sortings

Matrix game

combinatorics, math

Divine Tree

constructive algorithms, greedy, math, sortings, trees

A Good Problem

bitmasks, constructive algorithms, math

Red Light, Green Light (Easy version)

brute force, dfs and similar, dp, graphs, implementation, number theory

Make It Beautiful

bitmasks, data structures, greedy, math

Omg Graph

brute force, dsu, graphs, greedy, shortest paths, sortings

Wildflower

combinatorics, dfs and similar, trees

Lost Soul

brute force, greedy

Gellyfish and Baby's Breath

greedy, math, sortings

Gellyfish and Flaming Peony

constructive algorithms, dp, math, number theory

Kirei Attacks the Estate

dfs and similar, dp, greedy, trees

Come a Little Closer

brute force, greedy, implementation, math

Smilo and Minecraft

brute force, constructive algorithms, greedy

Reachability and Tree

constructive algorithms, dfs and similar, graphs, trees

Coloring Game

binary search, brute force, greedy, two pointers

Changing the String

binary search, data structures, greedy, implementation, sortings, strings

Creating a Schedule

constructive algorithms, data structures, greedy, implementation, sortings

Fewer Batteries

binary search, dfs and similar, dp, graphs, greedy, hashing

Racing

constructive algorithms, greedy

D/D/D

dfs and similar, graphs, greedy, shortest paths

Hacking Numbers (Medium Version)

constructive algorithms, interactive, math, number theory

Hacking Numbers (Easy Version)

bitmasks, constructive algorithms, interactive, math, number theory

Neo's Escape

binary search, brute force, data structures, dp, dsu, graphs, greedy, implementation

SUMdamental Decomposition

bitmasks, constructive algorithms, greedy, implementation, math

Maximum Subarray Sum

binary search, constructive algorithms, dp, implementation, math

Goblin

dfs and similar, dp, dsu, greedy, math

Wolf

binary search, greedy, math

Flower Boy

binary search, dp, greedy, two pointers

Unpleasant Strings

binary search, dp, greedy, strings

Array and GCD

binary search, greedy, math, number theory

Median Splits

binary search, greedy, implementation, sortings

Quartet Swapping

brute force, data structures, divide and conquer, greedy, sortings

Mex in the Grid

constructive algorithms, implementation

Sasha and the Apartment Purchase

math, sortings