Kuro and Walking Route

dfs and similar, trees

Mr. Kitayuta, the Treasure Hunter

dfs and similar, dp, two pointers

Find a Mine

binary search, constructive algorithms, geometry, greedy, interactive, math

Forming Teams

dfs and similar, implementation

Nastya Studies Informatics

math, number theory

I.O.U.

implementation

Creative Snap

binary search, brute force, divide and conquer, math

Mark and Lightbulbs

combinatorics, constructive algorithms, greedy, math, sortings

Treasure

greedy

Mashmokh and Tokens

binary search, greedy, implementation, math

Propagating tree

data structures, dfs and similar, trees

Coach

brute force, dfs and similar, graphs

Blood Cousins

binary search, data structures, dfs and similar, trees

Optimal Subsequences (Easy Version)

data structures, greedy

Biridian Forest

dfs and similar, shortest paths

Captain Flint and Treasure

data structures, dfs and similar, graphs, greedy, implementation, trees

Greenhouse Effect

dp

Ugly Pairs

dfs and similar, greedy, implementation, sortings, strings

Bicycle Race

geometry, implementation, math

Walking in the Rain

brute force, implementation

Robot Sequence

brute force, implementation

Photo of The Sky

brute force, implementation, math, sortings

Strange Definition

bitmasks, graphs, hashing, math, number theory

Relatively Prime Graph

brute force, constructive algorithms, graphs, greedy, math

Gerald and Giant Chess

combinatorics, dp, math, number theory

Sagheer and Crossroads

implementation

Skyscrapers (hard version)

data structures, dp, greedy

Vasya And Array

constructive algorithms, greedy, implementation

Qualifying Contest

constructive algorithms, sortings

Interesting Array

constructive algorithms, data structures, trees

Ice Sculptures

*special problem, brute force, number theory

Breaking the Wall

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

String Reversal

data structures, greedy, strings

Average Superhero Gang Power

brute force, implementation, math

Weather Tomorrow

implementation, math

Split a Number

greedy, implementation, strings

Two Hundred Twenty One (easy version)

data structures, dp, math

Tennis Tournament

implementation, math

Frodo and pillows

binary search, greedy

Integral Array

brute force, constructive algorithms, data structures, math

Lost Array

implementation

Segments

constructive algorithms, math

Not Equal on a Segment

data structures, implementation

Compatible Numbers

bitmasks, brute force, dfs and similar, dp

ATM and Students

binary search, data structures, two pointers

Three Bags

constructive algorithms, greedy

A and B and Lecture Rooms

binary search, data structures, dfs and similar, dp, trees

Petya and Java

implementation, strings

Little Frog

constructive algorithms

Tree and Queries

data structures, dfs and similar, trees

Yet Another Monster Fight

binary search, dp, greedy, implementation, math

Phone Numbers

implementation, strings

Heads or Tails

brute force, implementation

Round Table Knights

dp, math, number theory

SUM and REPLACE

brute force, data structures, dsu, number theory

Eternal Victory

dfs and similar, graphs, greedy, shortest paths, trees

A and B and Interesting Substrings

data structures, dp, two pointers

Alyona and Spreadsheet

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

Minimizing the Sum

dp, implementation

Minimal string

data structures, greedy, strings

Fire Again

brute force, dfs and similar, shortest paths

Vanya and Label

bitmasks, combinatorics, implementation, strings

New Year Parties

dp, greedy

Polo the Penguin and Strings

greedy

Sorting By Multiplication

dp, greedy

Valera and Contest

constructive algorithms, implementation, math

PawnChess

implementation

Another Array Problem

brute force, constructive algorithms, greedy

Fibonacci Words

*special problem, implementation

Tokitsukaze, CSL and Stone Game

games

Design Tutorial: Make It Nondeterministic

greedy

Fight Against Traffic

dfs and similar, graphs, shortest paths

Nested Segments

greedy, implementation, sortings

An impassioned circulation of affection

brute force, dp, strings, two pointers

Berland Fair

binary search, brute force, data structures, greedy

Parking Lot

combinatorics, math

Load Balancing

implementation, math

Maximum AND

bitmasks, dfs and similar, divide and conquer, greedy, sortings

Crazy Town

geometry

Shurikens

data structures, greedy, implementation

Cutting Carrot

geometry, math

Steps

binary search, implementation

1-2-K Game

games, math

Codecraft III

implementation

Verse Pattern

implementation, strings

Median

greedy, math, sortings

Arena of Greed

games, greedy

LOL Lovers

strings

Array Optimization by Deque

data structures, greedy

BA-String

brute force, dp, greedy, implementation, math

Matrix Cascade

brute force, constructive algorithms, data structures, dp, greedy, math

Reachability from the Capital

dfs and similar, graphs, greedy

Shortest Cycle

bitmasks, brute force, graphs, shortest paths

Cows and Primitive Roots

implementation, math, number theory

Sockets

greedy, implementation, sortings

XOUR

data structures, dsu, sortings

Dreamoon Likes Sequences

bitmasks, combinatorics, math

Bear and Forgotten Tree 3

constructive algorithms, graphs, trees

Tokitsukaze and Good 01-String (hard version)

dp, greedy, implementation

Pearls in a Row

greedy