Interval Mod

constructive algorithms, dp, greedy, math

Stamina and Tasks

dp, greedy, math

Where's My Water?

data structures, divide and conquer, dp, math

Simons and Beating Peaks

data structures, data structures, divide and conquer, dp, dp, greedy, implementation, trees

ABAB Construction

dp, greedy, greedy, greedy, implementation

Rigged Bracket Sequence

combinatorics, dp, greedy

Lost Civilization (Hard Version)

data structures, dp

Interactive Graph (Hard Version)

combinatorics, dfs and similar, dp, graphs, interactive

Interactive Graph (Simple Version)

binary search, combinatorics, dfs and similar, dp, graphs, interactive

Parabola Independence

dp, graphs, greedy, math, sortings

Idiot First Search

dfs and similar, dp, trees

The Turtle Strikes Back

dp, graphs, greedy, implementation

Secret message

bitmasks, brute force, dp, math, number theory

Pizza Delivery

dp, greedy

Product Queries

dp, math, number theory, shortest paths

Cost of Tree

dp, greedy, trees, trees

Sub-RBS (Hard Version)

dp, games, implementation, strings

Sub-RBS (Easy Version)

combinatorics, constructive algorithms, dp, greedy, strings, two pointers

Little String (Easy Version)

combinatorics, dp, greedy, math, number theory

Shortest Statement Ever

bitmasks, constructive algorithms, dp, greedy

Cherry Tree

dfs and similar, dp, graphs, trees

Unfair Game

combinatorics, dp, math

Christmas Tree Decoration

combinatorics, dp, greedy, math

Production of Snowmen

brute force, combinatorics, dp

Medical Parity

dp, strings

Insolvable Disks

data structures, dp, greedy, math

XOR-factorization

bitmasks, constructive algorithms, dp, greedy, number theory

First or Second

dp, greedy, implementation

Fibonacci Paths

data structures, dp, graphs, sortings

Wishing Cards

dp

Taiga's Carry Chains

bitmasks, brute force, dp, greedy, math

Rae Taylor and Trees (hard version)

binary search, constructive algorithms, data structures, dp, dsu, greedy, implementation, trees

Rae Taylor and Trees (easy version)

binary search, data structures, dp, dsu, greedy, implementation, trees

Range Operation

dp, greedy, math, two pointers

Mukhammadali and the Smooth Array

data structures, dp

Tree, TREE!!!

dfs and similar, dp, math, trees

Marble Council

dp, math, sortings

Monopati

brute force, combinatorics, dp, math, two pointers

Annoying Game

dp, games, greedy

Adjusting Drones

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

Not Alone

dp, greedy

Rabbits

constructive algorithms, dp, greedy, implementation

Inversion Value of a Permutation

constructive algorithms, dfs and similar, dp

Price Tags

brute force, dp, math

Non-Descending Arrays

combinatorics, dp, math

Inversion Graph Coloring (Easy Version)

combinatorics, data structures, dp, greedy, two pointers

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

Against the Difference

data structures, dp

Chicken Jockey

dp, greedy

From 1 to Infinity

binary search, dp, implementation, math

Wafu!

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

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

Segments Covering

dp, math, probabilities

Sponsor of Your Problems

dp, greedy, implementation, strings

Red Light, Green Light (Easy version)

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

Gellyfish and Flaming Peony

constructive algorithms, dp, math, number theory

Small Operations

binary search, brute force, dfs and similar, dp, math, number theory, sortings

Kirei Attacks the Estate

dfs and similar, dp, greedy, trees

Fewer Batteries

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

Neo's Escape

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

Maximum Subarray Sum

binary search, constructive algorithms, dp, implementation, math

Goblin

dfs and similar, dp, dsu, greedy, math

Flower Boy

binary search, dp, greedy, two pointers

Unpleasant Strings

binary search, dp, greedy, strings

Wonderful City

dp, implementation

Igor and Mountain

binary search, brute force, dp

Even String

brute force, combinatorics, dp, math, strings

Disappearing Permutation

dfs and similar, dp, dsu, graphs, greedy, implementation

Serval and The Formula

bitmasks, constructive algorithms, dp, greedy

Math Division

bitmasks, dp, math, probabilities

Scammy Game Ad

dp, greedy, implementation

Equalization

bitmasks, brute force, dp, graphs, math

Do You Love Your Hero and His Two-Hit Multi-Target Attacks?

binary search, brute force, constructive algorithms, dp, geometry, greedy, math

Infinite Sequence (Easy Version)

bitmasks, brute force, dp, implementation, math

Trapmigiano Reggiano

constructive algorithms, data structures, dfs and similar, dp, greedy, sortings, trees

Tree Jumps

dfs and similar, dp, trees

Beautiful Sequence

combinatorics, dp, greedy, two pointers

Two Large Bags

brute force, dp, greedy, sortings

White Magic

constructive algorithms, data structures, dp, greedy, implementation

Eating

binary search, bitmasks, brute force, data structures, dp, greedy, trees, two pointers

Remove the Ends

brute force, constructive algorithms, dp, greedy

Remove Exactly Two

brute force, data structures, dfs and similar, dp, graphs, greedy, sortings, trees

Kevin and And

bitmasks, brute force, dp, greedy, math, sortings

Kevin and Puzzle

2-sat, combinatorics, dp

Resourceful Caterpillar Sequence

dfs and similar, dp, games, graphs, greedy, trees

Bewitching Stargazer

bitmasks, divide and conquer, dp, math

Fix Flooded Floor

constructive algorithms, dp, graphs

Tree Destruction

dfs and similar, dp, trees

Three Strings

dp, implementation, strings

Uninteresting Number

brute force, dp, math

Shift + Esc

brute force, dp

Medium Demon Problem (hard version)

dfs and similar, dp, dsu, graphs, implementation, trees

Sums on Segments

binary search, brute force, data structures, dp, greedy, math

Cube

bitmasks, dfs and similar, dp

Bridge Renovation

brute force, dp, greedy, math, two pointers

Natlan Exploring

bitmasks, combinatorics, data structures, dp, math, number theory