Zero-XOR Array

*special problem, dp

Chess Rush

*special problem, combinatorics, dp, implementation, math

Flower Shop

*special problem, data structures, fft, math

Demonic Invasion

*special problem, flows

Road Repair in Treeland

*special problem, binary search, dp, trees

Unusual Graph

*special problem, graphs

The Hero with Bombs

*special problem

University Schedule

*special problem

Cyclic Shifts

*special problem, strings

Pac-Man 2.0

*special problem, dp

Viruses

*special problem, dp, shortest paths, string suffix structures

Roads

*special problem, geometry, sortings

Mixture

*special problem, data structures, geometry, math, sortings

Build From Suffixes

*special problem, combinatorics, data structures

Greedy Petya

*special problem, dfs and similar, graphs, greedy

Joker

*special problem, bitmasks, data structures, divide and conquer, dsu

Game with Segments

*special problem, data structures, games

Black Cat Rush

*special problem

Superstitions Inspection

*special problem

Perfectionist Arkadiy

*special problem, number theory

Pens And Days Of Week

*special problem, binary search, number theory

Colors

*special problem, binary search, constructive algorithms, interactive

Rogue-like Game

*special problem, brute force, greedy, two pointers

Star Trek

*special problem, combinatorics, dfs and similar, dp, games, graphs, matrices, trees

Encoded message

*special problem, implementation

Loader

*special problem

Different variables

*special problem

King's Path

*special problem, math, trees

Painting Numbers

*special problem, data structures, greedy, number theory

HQ

*special problem, constructive algorithms

L BREAK into program

*special problem

Village (Maximum)

*special problem, dfs and similar, trees

Rotate Matrix

*special problem

Interval Coloring

*special problem, greedy, math

Sort the Table

*special problem, sortings

Feed the Golorp

*special problem

The Potion of Great Power

*special problem, 2-sat, binary search, data structures, graphs, interactive, sortings, two pointers

Perse-script

*special problem, expression parsing

Composing Of String

*special problem, dp

Hamming Distance

*special problem

Pairwise Sums

*special problem

Table Bowling

*special problem, sortings

kotlinkotlinkotlinkotlin...

*special problem, graphs, implementation, strings

Two IP Cameras

*special problem, math, number theory

Dogecoin

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

Array sorting

*special problem, sortings

Array Sorting

*special problem

Big Number and Remainder

*special problem, math, number theory

Spring cleaning

*special problem, data structures, dfs and similar, graphs, trees

Hungarian Notation

*special problem

Suffix Subgroup

*special problem, strings

INI-file

*special problem, implementation

Chain Letter

*special problem, dfs and similar, graphs

Caesar Cipher

*special problem

Path Canonization

*special problem

Palindromic Doubles

*special problem, data structures, dp

Repairing Of String

*special problem, constructive algorithms

BHTML+BCSS

*special problem, dfs and similar, expression parsing

Mysterious language again, seriously?

*special problem

On a plane

*special problem, geometry

Math

*special problem, math

Euclidean Distance

*special problem

Battleship

*special problem, dfs and similar, implementation

Levenshtein distance

*special problem

Jumping frogs

*special problem

Number Deletion Game

*special problem, dp, games, greedy

Points in triangle

*special problem, geometry

Triskaidekaphobia

*special problem

Maximal Difference

*special problem

Neural Network Problem

*special problem, binary search, greedy

Significant Cups

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

Amusement Park

*special problem, ternary search

Graph

*special problem, binary search, dfs and similar, dp, math, ternary search

Village (Minimum)

*special problem, dp, greedy, trees

Rosetta Problem

*special problem

Hostname Aliases

*special problem, binary search, data structures, implementation, sortings, strings

Non-decimal sum

*special problem

Truncatable primes

*special problem

Date Change

*special problem

Divisibility Check

*special problem

Counting Fridays

*special problem

Array Sum

*special problem

Domain

*special problem, expression parsing

Double Permutation Inc.

*special problem, binary search, greedy

Teams

*special problem, binary search, greedy, math

Chess Match

*special problem

Dune II: Battle For Arrakis

*special problem, data structures, greedy, math

Bars

*special problem, binary search

Stepan's Series

*special problem, dp

Without Text

*special problem

Tanya and Colored Candies

*special problem, dp

Out of Controls

*special problem

Kids' Riddle

*special problem

BF Calculator

*special problem

A Piece of Cake

*special problem, implementation

MYSTERIOUS LANGUAGE

*special problem

Tree-String Problem

*special problem, dfs and similar, hashing, strings

Twisted Circuit

*special problem, brute force, implementation

Closest Equals

*special problem, data structures

Exchange of Books

*special problem