Random Walk

dp, graphs, math, probabilities, trees

Two Tanks

binary search, dp, implementation, math

Zoning Restrictions

dp, flows, graphs

Autocompletion

data structures, dfs and similar, dp

Keep XOR Low

bitmasks, combinatorics, data structures, divide and conquer, dp, math

Preorder Test

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

Bear and Floodlight

bitmasks, dp, geometry

Research Rover

combinatorics, dp

Elevator

dp, graphs, shortest paths

String Journey

data structures, dp, string suffix structures

Serious Business

data structures, divide and conquer, dp, implementation, shortest paths

Complete Mirror

constructive algorithms, dfs and similar, dp, hashing, implementation, trees

Game on Tree (Hard)

dfs and similar, dp, games, trees

Danger of Mad Snakes

combinatorics, dp, math

Even Harder

dp

Boboniu and Jianghu

dp, greedy, sortings, trees

Fibonacci Sums

dp, math

Casinos and travel

dp

Singer House

combinatorics, dp, graphs, trees

A Museum Robbery

data structures, dp

Abnormal Permutation Pairs (hard version)

combinatorics, dp, fft, math

Baby Ehab Plays with Permutations

combinatorics, dp, math

Gotta Go Fast

binary search, dp

Nauuo and Pictures (hard version)

dp, probabilities

Wise Men (Easy Version)

bitmasks, brute force, dp, meet-in-the-middle

Monsters and Potions

brute force, dp, greedy, implementation

Balance

dp

Numbers

dp, math, number theory

Helping People

dp, probabilities

Balanced Domino Placements

combinatorics, dp

Christmas Chocolates

dfs and similar, dp, games, graphs, implementation, math, number theory, shortest paths, trees

New Year and Handle Change

binary search, dp

Small Permutation Problem (Hard Version)

combinatorics, dp, math

Nested Rubber Bands

constructive algorithms, dfs and similar, dp, math, trees

Economic Difficulties

data structures, dfs and similar, dp, flows, graphs, trees

Algebra Flash

bitmasks, brute force, dp, graphs, math, meet-in-the-middle, trees

Inna and Sequence

binary search, data structures, dp, trees

Ostap and Tree

dp, trees

Strange LCS

bitmasks, dp, graphs, greedy, strings

Beautiful Road

dfs and similar, dp, dsu, graphs, implementation, sortings, trees

Puzzle

constructive algorithms, dp, greedy

Battle Lemmings

dp, greedy

Expected Square Beauty

dp, math, probabilities

Tree

data structures, dfs and similar, dp, graphs, trees

Long Colorful Strip

dp

Zublicanes and Mumocrates

dp, trees, two pointers

Delivery Club

binary search, data structures, dp

DSU Master

combinatorics, dp, dsu, math

Clearing Up

constructive algorithms, dp, dsu, graphs

Region Separation

combinatorics, dp, number theory, trees

What Has Dirichlet Got to Do with That?

dp, games

Christmas Game

bitmasks, data structures, dfs and similar, dp, games, math, trees

Education Reform

dp

One-X

combinatorics, dfs and similar, dp, math, trees

Gerald and Path

dp, sortings

Realistic Gameplay

dp, greedy

Subsequences Galore

bitmasks, combinatorics, dp

Third Month Insanity

dp, probabilities, trees

Progress Monitoring

dp, trees

Majority

combinatorics, dp, math, strings

PolandBall and Many Other Balls

combinatorics, divide and conquer, dp, fft, math, number theory

Fafa and Ancient Mathematics

dfs and similar, dp, trees

Tanya and Colored Candies

*special problem, dp

Flow Control

dfs and similar, dp, greedy, trees

Game with Strings

bitmasks, dp, probabilities

Lucky Number Representation

constructive algorithms, dfs and similar, dp

New Year Garland

combinatorics, dp

Vasya and Big Integers

binary search, data structures, dp, hashing, strings

Palindrome Partition

dp, string suffix structures, strings

Sereja and Two Sequences

data structures, dp

Cutlet

data structures, dp

Tower of Hanoi

dp

Huge Strings

bitmasks, brute force, dp, implementation, strings

Ela Goes Hiking

combinatorics, dp, math, probabilities

The Top Scorer

combinatorics, dp, math, probabilities

Doremy's Drying Plan (Hard Version)

data structures, dp

Sum the Fibonacci

bitmasks, divide and conquer, dp, fft, math

Morse Code

binary search, data structures, dp, hashing, sortings, string suffix structures, strings

Turtle

dp, implementation

Shaass the Great

dp, trees

Construct Tree

bitmasks, constructive algorithms, dp, trees

Guard Duty (medium)

binary search, dp, greedy, sortings

Guess the Tree

bitmasks, constructive algorithms, dp, greedy, trees

Help Caretaker

brute force, dp

Vasya and Maximum Matching

dp, trees

Mercenaries

bitmasks, brute force, combinatorics, dp, dsu, math, two pointers

The Chocolate Spree

dfs and similar, dp, graphs, trees

Dead Ends

bitmasks, dp

Cookies

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

K-Set Tree

combinatorics, dfs and similar, dp, math, trees

Vladik and chat

brute force, constructive algorithms, dp, implementation, strings

Narrow Components

brute force, data structures, dp, dsu, math, trees

Подкрутка II

*special problem, dp

Jee, You See?

bitmasks, combinatorics, dp

Miss Punyverse

dp, greedy, trees

Destroy the Colony

combinatorics, dp, math

Game with Cards

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

Comb

data structures, dp

Clusterization Counting

combinatorics, dp, dsu, fft, graphs, trees

Points Movement

data structures, dp, greedy, implementation, sortings