Palindromex

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

Mental Monumental (Hard Version)

data structures, greedy, math, two pointers

Mental Monumental (Easy Version)

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

Equal Multisets (Easy Version)

binary search, brute force, greedy, two pointers

Bowser's Castle (Hard Version)

constructive algorithms, divide and conquer, interactive, trees, two pointers

Bowser's Castle (Medium Version)

constructive algorithms, divide and conquer, interactive, trees, two pointers

Sum of Fractions

binary search, brute force, combinatorics, data structures, greedy, math, number theory, two pointers

Binary Search with One Swap

binary search, divide and conquer, dp, hashing, math, two pointers

Array and Permutation

implementation, schedules, sortings, two pointers

Another Problem about Beautiful Pairs

brute force, math, two pointers

Monster Game

binary search, sortings, two pointers

Comparable Permutations

greedy, implementation, interactive, sortings, two pointers

Sub-RBS (Easy Version)

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

The Robotic Rush

binary search, greedy, implementation, two pointers

OutOfMemoryError

data structures, implementation, math, two pointers

War Strategy

binary search, greedy, math, two pointers

New Year's Gifts

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

Needle in a Haystack

greedy, strings, two pointers

Quotient and Remainder

binary search, greedy, two pointers

Range Operation

dp, greedy, math, two pointers

Copy String

greedy, implementation, strings, two pointers

Monopati

brute force, combinatorics, dp, math, two pointers

Loyalty

constructive algorithms, greedy, sortings, two pointers

Inverse Minimum Partition (Easy Version)

binary search, brute force, dp, geometry, greedy, math, two pointers

Rectangles

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

Billion Players Game

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

No Mind To Think

binary search, divide and conquer, greedy, sortings, ternary search, two pointers

Catshock

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

Notelock

greedy, two pointers

Hidden Knowledge of the Ancients

data structures, two pointers

Split

binary search, data structures, two pointers

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

Discounts

greedy, sortings, two pointers

All Lengths Subtraction

brute force, two pointers

Antiamuny Wants to Learn Swap

data structures, greedy, two pointers

Like the Bitset

constructive algorithms, greedy, two pointers

Unjust Binary Life

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

Submedians (Hard Version)

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

Deque Process

constructive algorithms, greedy, sortings, two pointers

Big Wins! (hard version)

binary search, data structures, divide and conquer, dsu, trees, two pointers

Big Wins! (easy version)

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

Sets of Complementary Sums

brute force, combinatorics, dp, math, two pointers

Make a Palindrome

greedy, sortings, two pointers

MEX Count

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

Yamakasi

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

Coloring Game

binary search, brute force, greedy, two pointers

Equal Values

brute force, greedy, two pointers

Flower Boy

binary search, dp, greedy, two pointers

Keep the Sum

constructive algorithms, implementation, two pointers

Local Construction

constructive algorithms, dfs and similar, implementation, two pointers

Mani and Segments

data structures, implementation, sortings, two pointers

23 Kingdom

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

Wonderful Impostors

data structures, implementation, two pointers

Tung Tung Sahur

greedy, strings, two pointers

Shorten the Array

binary search, bitmasks, data structures, dfs and similar, greedy, strings, trees, two pointers

Interesting Ratio

brute force, math, number theory, two pointers

Canteen (Hard Version)

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

Canteen (Easy Version)

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

Blossom

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

Counting Points

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

Palindrome Shuffle

binary search, greedy, hashing, strings, two pointers

Beautiful Sequence

combinatorics, dp, greedy, two pointers

Ads

binary search, greedy, two pointers

We Be Summing

binary search, data structures, dp, two pointers

Eating

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

Variety is Discouraged

binary search, constructive algorithms, greedy, two pointers

Game With Triangles

binary search, brute force, data structures, geometry, greedy, implementation, math, ternary search, two pointers

Game of Mathletes

games, greedy, sortings, two pointers

Formation

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

The Trail

brute force, constructive algorithms, greedy, math, two pointers

Affectionate Arrays (Hard Version)

data structures, dp, graphs, greedy, math, shortest paths, two pointers

Counting Pairs

binary search, sortings, two pointers

Kevin and Competition Memories

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

Adventurers

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

Recommendations

data structures, implementation, sortings, two pointers

Selection Sort

binary search, data structures, greedy, two pointers

Non Prime Tree

brute force, constructive algorithms, dfs and similar, greedy, number theory, trees, two pointers

Ordered Permutations

bitmasks, combinatorics, constructive algorithms, greedy, math, two pointers

Bridge Renovation

brute force, dp, greedy, math, two pointers

Ardent Flames

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

Kachina's Favorite Binary String

dp, greedy, interactive, two pointers

Sharky Surfing

data structures, greedy, two pointers

XORificator 3000

bitmasks, dp, number theory, two pointers

Rakhsh's Revival

data structures, greedy, implementation, two pointers

Sakurako's Field Trip

dp, greedy, two pointers

Genokraken

constructive algorithms, data structures, graphs, greedy, implementation, interactive, trees, two pointers

Trinity

binary search, math, sortings, two pointers

Penchick and Desert Rabbit

binary search, data structures, dfs and similar, dp, dsu, greedy, implementation, two pointers

Orangutan Approved Subarrays

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

Alice's Adventures in Cutting Cake

binary search, dp, greedy, two pointers

The Endspeaker (Hard Version)

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

The Endspeaker (Easy Version)

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

Attribute Checks

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

New Game

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

Two Screens

binary search, greedy, strings, two pointers

Speedbreaker

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

Message Transmission Error (hard version)

hashing, string suffix structures, strings, two pointers

Yunli's Subarray Queries (easy version)

binary search, data structures, two pointers

Eri and Expanded Sets

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