XK Segments

binary search, math, sortings, two pointers

Nearest Fraction

brute force, implementation, two pointers

The Tower is Going Home

binary search, two pointers

Processing Queries

*special problem, constructive algorithms, data structures, two pointers

Spider's Web

binary search, sortings, two pointers

Count Triangles

binary search, implementation, math, two pointers

Cleaning the Phone

binary search, dp, sortings, two pointers

Integers Have Friends

binary search, data structures, divide and conquer, math, number theory, two pointers

Three Blocks Palindrome (hard version)

brute force, data structures, dp, two pointers

Two Platforms

binary search, dp, sortings, two pointers

Rating System

binary search, brute force, data structures, dp, dsu, greedy, math, two pointers

Range = √Sum

binary search, brute force, constructive algorithms, math, two pointers

Letter Picking

constructive algorithms, dp, games, two pointers

Boboniu Chats with Du

dp, greedy, sortings, two pointers

A and B and Interesting Substrings

data structures, dp, two pointers

ATM and Students

binary search, data structures, two pointers

Shortest and Longest LIS

constructive algorithms, graphs, greedy, two pointers

Slime Escape

data structures, dp, greedy, two pointers

Slimes

binary search, constructive algorithms, data structures, greedy, two pointers

Moscow Gorillas

binary search, dp, greedy, implementation, math, two pointers

Xor-Subsequence (easy version)

bitmasks, brute force, dp, strings, trees, two pointers

Petya and Array

data structures, divide and conquer, two pointers

Sheikh (Easy version)

binary search, bitmasks, greedy, two pointers

Range and Partition

binary search, constructive algorithms, data structures, greedy, two pointers

Max GEQ Sum

binary search, constructive algorithms, data structures, divide and conquer, implementation, two pointers

Rating Compression

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

K Balanced Teams

dp, sortings, two pointers

Rudolf and Imbalance

binary search, greedy, sortings, two pointers

Irreducible Anagrams

binary search, constructive algorithms, data structures, strings, two pointers

Vasya and Robot

binary search, two pointers

Send Boxes to Alice (Easy Version)

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

Maximum Xor Secondary

data structures, implementation, two pointers

Imbalanced Arrays

constructive algorithms, graphs, greedy, math, sortings, two pointers

Petya and Exam

greedy, sortings, two pointers

Epidemic in Monstropolis

constructive algorithms, dp, greedy, two pointers

Foe Pairs

combinatorics, sortings, two pointers

Maximize!

binary search, greedy, ternary search, two pointers

Jury Meeting

greedy, sortings, two pointers

Random Query

data structures, math, probabilities, two pointers

Correcting Mistakes

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

Cubes

binary search, dp, two pointers

Beaver

data structures, dp, greedy, hashing, strings, two pointers

Lightsabers (medium)

binary search, two pointers

Modulo Sum

combinatorics, data structures, dp, two pointers

Zigzags

brute force, combinatorics, data structures, math, two pointers

The Best Vacation

binary search, brute force, greedy, implementation, two pointers

Mr. Kitayuta, the Treasure Hunter

dfs and similar, dp, two pointers

Binary Literature

constructive algorithms, greedy, implementation, strings, two pointers

Multiple Testcases

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

Perform Easily

binary search, brute force, dp, implementation, sortings, two pointers

Array Stabilization (GCD version)

binary search, brute force, data structures, divide and conquer, number theory, two pointers

Permutation Restoration

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

1D Sokoban

binary search, dp, greedy, implementation, two pointers

Dances (Hard Version)

binary search, greedy, sortings, two pointers

Frog Traveler

data structures, dfs and similar, dp, graphs, shortest paths, two pointers

Up the Strip

brute force, dp, math, number theory, two pointers

Two Paths

dfs and similar, dp, graphs, shortest paths, trees, two pointers

Inconvenient Pairs

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

Pairs

binary search, constructive algorithms, greedy, two pointers

Blocking Elements

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

White Lines

brute force, data structures, dp, implementation, two pointers

Reverse Sort Sum

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

The Butcher

geometry, greedy, implementation, sortings, two pointers

Image Preview

binary search, brute force, dp, two pointers

Good Triple

brute force, two pointers

Exposition

binary search, data structures, dsu, trees, two pointers

Single-use Stones

binary search, flows, greedy, two pointers

Read Time

binary search, greedy, two pointers

Unusual Entertainment

data structures, dfs and similar, dsu, shortest paths, sortings, trees, two pointers

Non-Secret Cypher

two pointers

Skills

binary search, brute force, dp, greedy, sortings, two pointers

Olympiad

binary search, greedy, sortings, two pointers

Array Game

games, greedy, two pointers

Card Game Again

binary search, data structures, number theory, two pointers

Rooter's Song

constructive algorithms, data structures, geometry, implementation, sortings, two pointers

Diana and Liana

greedy, implementation, two pointers

Bug in Code

data structures, graphs, implementation, two pointers

Building Bridge

geometry, ternary search, two pointers

Yet Another Yet Another Task

data structures, dp, implementation, two pointers

Prefixes and Suffixes

dp, string suffix structures, strings, two pointers

Match Points

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

Choosing flowers

binary search, brute force, data structures, dfs and similar, dp, greedy, sortings, two pointers

Pair of Numbers

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

Minimizing Difference

binary search, constructive algorithms, greedy, sortings, ternary search, two pointers

Berserk And Fireball

constructive algorithms, greedy, implementation, math, two pointers

New Year Concert

binary search, data structures, greedy, math, number theory, two pointers

Cheap Dinner

brute force, data structures, graphs, greedy, implementation, sortings, two pointers

Searchlights

binary search, brute force, data structures, dp, implementation, sortings, two pointers

Pairs of Segments

data structures, greedy, sortings, two pointers

R2D2 and Droid Army

binary search, data structures, two pointers

Sequence Sorting

dp, greedy, two pointers

Shuffle

combinatorics, math, two pointers

Maximum Subarray

data structures, dp, greedy, two pointers

Moving Dots

binary search, brute force, combinatorics, math, two pointers

Range Sorting (Easy Version)

binary search, dp, dsu, greedy, trees, two pointers

Cyclic MEX

data structures, implementation, math, two pointers

Decreasing Debts

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

Strip

binary search, data structures, dp, two pointers

Vlad and the Mountains

binary search, data structures, dsu, graphs, implementation, sortings, trees, two pointers

MEX vs MED

math, two pointers