Game with Stones

binary search, data structures, games, greedy

Guess the Permutation

binary search, combinatorics, interactive, math

Korney Korneevich and XOR (hard version)

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

Pchelyonok and Segments

binary search, data structures, dp, greedy, math

Labyrinth

binary search, dsu, greedy

Jeopardy of Dropped Balls

binary search, brute force, dsu, implementation

Building an Amusement Park

binary search, geometry

The Strongest Build

binary search, brute force, data structures, dfs and similar, graphs, greedy, hashing, implementation

Slay the Dragon

binary search, greedy, sortings, ternary search

Polygon

binary search, dp, geometry

Book

binary search, brute force, data structures, dp, graphs, implementation, sortings

Physical Examination

*special problem, binary search, data structures

Inconvenient Pairs

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

Median Maximization

binary search, greedy, math

Deep Down Below

binary search, greedy, sortings

Nearest Beautiful Number (easy version)

binary search, bitmasks, brute force, constructive algorithms, dfs and similar, greedy

Polycarp and String Transformation

binary search, implementation, sortings, strings

Down Below

binary search, dfs and similar, graphs, greedy, meet-in-the-middle, shortest paths

Mikasa

binary search, bitmasks, greedy, implementation

Guess the Perimeter

binary search, interactive, number theory

Telepanting

binary search, data structures, dp, sortings

Fixed Points

binary search, brute force, dp

Wonderful Coloring - 2

binary search, constructive algorithms, data structures, greedy

Jumping Around

binary search, data structures, divide and conquer, dp, dsu, graphs, shortest paths

Stringforces

binary search, bitmasks, brute force, dp, strings, two pointers

Excellent Arrays

binary search, combinatorics, constructive algorithms, implementation, math, sortings, two pointers

Integers Have Friends

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

Array Stabilization (GCD version)

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

Inverse Inversions

binary search, brute force, data structures

Game with Cards

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

PriceFixed

binary search, greedy, implementation, sortings, two pointers

Gift Set

binary search, greedy, math, ternary search

Interesting Function

binary search, dp, math, number theory

Number of Pairs

binary search, data structures, math, two pointers

Erase and Extend (Hard Version)

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

Erase and Extend (Easy Version)

binary search, brute force, dp, greedy, hashing, implementation, string suffix structures, strings, two pointers

String Distance

binary search, brute force, data structures, hashing, implementation, strings

Gold Transfer

binary search, data structures, dp, greedy, interactive, trees

Unstable String

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

Binary String Partition

*special problem, binary search, greedy

Chess Team Forming

*special problem, binary search, data structures, greedy

Сортировка слиянием

*special problem, binary search

Pursuit

binary search, brute force, greedy, sortings

Partition Game

binary search, data structures, divide and conquer, dp

Nastia and a Beautiful Matrix

binary search, constructive algorithms, dp, greedy

Guess the K-th Zero (Hard version)

binary search, constructive algorithms, data structures, interactive

Guess the K-th Zero (Easy version)

binary search, interactive

Group Photo

binary search, data structures, implementation, two pointers

Cut

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

Phoenix and Diamonds

binary search, data structures, sortings

Baby Ehab's Hyper Apartment

binary search, graphs, interactive, sortings, two pointers

Cut and Stick

binary search, data structures, greedy, implementation, sortings

Almost Sorted

binary search, combinatorics, constructive algorithms, implementation

Travelling Salesman Problem

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

Subset Trick

binary search, data structures

Two chandeliers

binary search, brute force, chinese remainder theorem, math, number theory

Box Fitting

binary search, bitmasks, data structures, greedy

1D Sokoban

binary search, dp, greedy, implementation, two pointers

K-beautiful Strings

binary search, brute force, constructive algorithms, greedy, strings

Maximum width

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

Magnets

binary search, constructive algorithms, interactive

Old Floppy Drive

binary search, data structures, math

Equalize the Array

binary search, data structures, greedy, math, sortings

Accidental Victory

binary search, data structures, greedy

Sum of Cubes

binary search, brute force, brute force, math

Dogecoin

*special problem, *special problem, binary search, data structures

Problemsolving Marathon

*special problem, binary search, greedy

Two Policemen

*special problem, binary search, brute force, math

Pythagorean Triples

binary search, brute force, math, number theory

Paired Payment

binary search, brute force, constructive algorithms, dp, flows, graphs, shortest paths

Max Median

binary search, data structures, dp

Guessing the Greatest (hard version)

binary search, interactive

Guessing the Greatest (easy version)

binary search, interactive

Eastern Exhibition

binary search, geometry, shortest paths, sortings

Floor and Mod

binary search, brute force, math, number theory

Vabank

binary search, interactive

Odd Mineral Resource

binary search, bitmasks, brute force, data structures, probabilities, trees

Searching Local Minimum

binary search, interactive, ternary search

Lanterns

binary search, data structures, dp

Inflation

binary search, brute force, greedy, math

K-divisible Sum

binary search, constructive algorithms, greedy, math

Cleaning the Phone

binary search, dp, sortings, two pointers

Different Divisors

binary search, constructive algorithms, greedy, math, number theory

Correct Placement

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

Strange Permutation

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

Strange Shuffle

binary search, brute force, constructive algorithms, interactive

Strange Birthday Party

binary search, dp, greedy, sortings, two pointers

Power Sockets

binary search, data structures, greedy

Prime Divisors Selection

binary search, greedy, math, number theory

Hobbits

binary search, geometry

Firecrackers

binary search, sortings

The Riddle of the Sphinx

binary search, data structures, data structures, interactive

Pairs

binary search, constructive algorithms, greedy, two pointers

Dungeon

binary search, math

The Treasure of The Segments

binary search, data structures, greedy

Close Tuples (hard version)

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

Close Tuples (easy version)

binary search, combinatorics, math, sortings, two pointers

Divide and Summarize

binary search, brute force, data structures, divide and conquer, implementation, sortings

Array Partition

binary search, data structures, greedy, two pointers

Dog Snacks

binary search, dfs and similar, dp, greedy, trees