Maximum Balanced Circle

constructive algorithms, dp, greedy, two pointers

Mocha and Diana (Hard Version)

brute force, constructive algorithms, dfs and similar, dsu, graphs, greedy, trees, two pointers

Range Deleting

binary search, combinatorics, data structures, two pointers

Gadgets for dollars and pounds

binary search, greedy, two pointers

Prefixes and Suffixes

constructive algorithms, strings, two pointers

Processing Queries

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

Speedrun

brute force, dfs and similar, dp, graphs, greedy, math, sortings, two pointers

Trees and Segments

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

Segments Removal

data structures, dsu, flows, implementation, two pointers

Special Segments of Permutation

data structures, divide and conquer, dsu, two pointers

Paint the Middle

dp, greedy, sortings, two pointers

The Tower is Going Home

binary search, two pointers

Into Blocks (easy version)

data structures, dsu, greedy, implementation, two pointers

MEX vs MED

math, two pointers

Read Time

binary search, greedy, two pointers

Unusual Entertainment

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

OpenStreetMap

data structures, two pointers

Nearest Fraction

brute force, implementation, two pointers

Send Boxes to Alice (Hard Version)

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

Vlad and the Mountains

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

Flying Sort (Easy Version)

dp, greedy, two pointers

Exposition

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

Maximize!

binary search, greedy, ternary search, two pointers

Single-use Stones

binary search, flows, greedy, two pointers

MEX vs DIFF

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

Foe Pairs

combinatorics, sortings, two pointers

Enduring Exodus

binary search, two pointers

Travelling Salesman Problem

binary search, data structures, dp, greedy, shortest paths, sortings, two pointers

Strange Game On Matrix

greedy, two pointers

News About Credit

*special problem, greedy, two pointers

Pencils and Boxes

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

Epidemic in Monstropolis

constructive algorithms, dp, greedy, two pointers

Image Preview

binary search, brute force, dp, two pointers

Strip

binary search, data structures, dp, two pointers

Decreasing Debts

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

XK Segments

binary search, math, sortings, two pointers

The Butcher

geometry, greedy, implementation, sortings, two pointers

Shifts

brute force, two pointers

Good Triple

brute force, two pointers

Multitasking

greedy, implementation, sortings, two pointers

Cyclic MEX

data structures, implementation, math, two pointers

Where Are My Flakes?

implementation, two pointers

Balls Game

brute force, two pointers

Range Sorting (Easy Version)

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

Moving Dots

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

Array Partition

binary search, data structures, greedy, two pointers

Boring Segments

data structures, sortings, trees, two pointers

Shuffle

combinatorics, math, two pointers

Reverse Sort Sum

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

Maximum Subarray

data structures, dp, greedy, two pointers

Watch the Videos

binary search, constructive algorithms, two pointers

Sequence Sorting

dp, greedy, two pointers

Two Arrays

binary search, brute force, combinatorics, constructive algorithms, dp, two pointers

Kate and imperfection

greedy, implementation, math, number theory, sortings, two pointers

White Lines

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

Cut

binary search, data structures, dp, graphs, number theory, two pointers

Petya and Exam

greedy, sortings, two pointers

R2D2 and Droid Army

binary search, data structures, two pointers

Pairs of Segments

data structures, greedy, sortings, two pointers

Imbalanced Arrays

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

Searchlights

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

Pairs

binary search, constructive algorithms, greedy, two pointers

Inconvenient Pairs

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

Count Pairs

math, matrices, number theory, two pointers

Blocking Elements

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

Two Paths

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

Mysterious Crime

brute force, combinatorics, math, meet-in-the-middle, two pointers

Cheap Dinner

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

Maximum Xor Secondary

data structures, implementation, two pointers

Send Boxes to Alice (Easy Version)

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

New Year Concert

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

The Bakery

binary search, data structures, divide and conquer, dp, two pointers

Vasya and Robot

binary search, two pointers

Convenient For Everybody

binary search, two pointers

Up the Strip

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

Berserk And Fireball

constructive algorithms, greedy, implementation, math, two pointers

Lonely Numbers

binary search, math, number theory, two pointers

Dress'em in Vests!

binary search, brute force, greedy, two pointers

GCD of an Array

brute force, data structures, hashing, implementation, math, number theory, sortings, two pointers

Frog Traveler

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

Maximum Subrectangle

binary search, implementation, two pointers

Minimizing Difference

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

Pair of Numbers

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

Dances (Hard Version)

binary search, greedy, sortings, two pointers

Irreducible Anagrams

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

Erase and Extend (Hard Version)

binary search, data structures, greedy, hashing, string suffix structures, strings, two pointers

Three-level Laser

binary search, greedy, two pointers

Sorting the Coins

dsu, implementation, sortings, two pointers

Ones and Twos

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

K Balanced Teams

dp, sortings, two pointers

1D Sokoban

binary search, dp, greedy, implementation, two pointers

Rudolf and Imbalance

binary search, greedy, sortings, two pointers

Anton and Making Potions

binary search, dp, greedy, two pointers

Rating Compression

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

Choosing flowers

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

Permutation Restoration

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

Max GEQ Sum

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

Range and Partition

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

Array Stabilization (GCD version)

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

Perform Easily

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