Cows and Cool Sequences

dp, math, number theory

Choosing Two Paths

dfs and similar, dp, greedy, trees

Crisp String

bitmasks, dp

Widget Library

dp, expression parsing, graphs, implementation

Writing a Song

brute force, dp, strings

Cleaning Robots

dp, trees

Context Advertising

dp, two pointers

Wall Bars

dp

Awards For Contestants

brute force, data structures, dp

The Wall (hard)

dp

Double Elimination

dp, implementation

Xenia and Dominoes

bitmasks, dfs and similar, dp

Encryption (hard)

data structures, dp

Dormitory

dp, implementation

PE Lesson

brute force, dp

Similar Words

dp, hashing, strings, trees

Candies and Stones

divide and conquer, dp

Tachibana Kanade's Tofu

dp

World of Darkraft

dp, games

Gifts from Grandfather Ahmed

dp, math, number theory

Write The Contest

binary search, dp, math

Polycarpus the Safecracker

brute force, dp

The Great Julya Calendar

dp

Garden

bitmasks, dp, graphs, trees

Game with Strings

bitmasks, dp, games

Half-decay tree

data structures, divide and conquer, dp, math, probabilities

Simplified Nonogram

bitmasks, dp, hashing, meet-in-the-middle

Electrical Efficiency

combinatorics, data structures, dp, math, number theory, trees

Guards In The Storehouse

bitmasks, dp

PE Lesson

dp

Horse Races

dp, math

Game with Points

dp, graphs, implementation, shortest paths

Igor and Interesting Numbers

brute force, combinatorics, dp, math

Keen Tree Calculation

binary search, data structures, dp, geometry, graphs, implementation, trees

Colorful Stones

dp, two pointers

Crime Management

dp, graphs, matrices

Strange Calculation and Cats

dp, matrices

Little Elephant and Retro Strings

dp

Rhombus

brute force, data structures, dp

Wilbur and Strings

dfs and similar, dp, graphs, strings

Lesson Timetable

combinatorics, dp, math

Dima and Figure

dp

Cowboys

combinatorics, dp, math

Smart Boy

dp, games, strings

Masha and Cactus

dp, trees

The Great Julya Calendar

dp

Arrangement

bitmasks, dp

Journey

dp, trees

Pasha and Pipe

binary search, brute force, combinatorics, dp, implementation

Packmen Strike Back

binary search, dp, math

Expression

dp

Shoe Store

dp, graph matchings, greedy, sortings, two pointers

Flags

dp, math, matrices

Journey

dp, math

Trails (Hard)

dp, matrices

Convex Countour

dp

Representative Sampling

dp, sortings, strings

Domino Carpet

dp, implementation

Rectangles and Square

brute force, dp

Hyper String

dp

Binary Key

dp, greedy, implementation

Plane of Tanks: Duel

brute force, dp, math, probabilities

Min-Fund Prison (Medium)

brute force, dfs and similar, dp, graphs, trees

Send the Fool Further! (hard)

dfs and similar, dp, math, trees

School

dp, dsu

The Great Marathon

dp

Summer Reading

dp, greedy

Palindromic Doubles

*special problem, data structures, dp

Poachers

dp, games, graphs, trees

Maximum Sum Subarrays

*special problem, dp

Min-Fund Prison (Hard)

bitmasks, dfs and similar, dp, graphs, trees

Number Deletion Game

*special problem, dp, games, greedy

Clever Fat Rat

dp

Colored Jenga

dfs and similar, dp, probabilities

Composing Of String

*special problem, dp

A Battle Against a Dragon

*special problem, data structures, dp