Suggested Friends

brute force, graphs

Harry Potter and the Sorting Hat

brute force, dfs and similar, hashing

Geometrical problem

implementation

Tetris revisited

constructive algorithms, graph matchings, greedy, math

Two progressions

constructive algorithms, greedy

Leaders

dfs and similar, dsu, graphs, trees

Tournament-graph

constructive algorithms, graphs

Caesar Cipher

*special problem

Cannon

data structures, geometry, sortings

Bowls

geometry, implementation

Trails (Hard)

dp, matrices

Representative Sampling

dp, sortings, strings

Mister B and Boring Game

games, greedy

Synchrophasotron

brute force

Luck is in Numbers

greedy

Min-Fund Prison (Medium)

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

Battlefield

geometry, graphs, implementation, shortest paths

Greedy Elevator

data structures, implementation

Beautiful Function

constructive algorithms, math

Item World

brute force, implementation, sortings

BHTML+BCSS

*special problem, dfs and similar, expression parsing

School

dp, dsu

Repairing Of String

*special problem, constructive algorithms

Marmots (medium)

math

Puzzling Language

constructive algorithms

Endless Roses Most Beautiful

Palindromic Doubles

*special problem, data structures, dp

Игра в Девятку II

*special problem, brute force

Suns and Rays

dfs and similar, implementation

Suns and Rays

constructive algorithms, dfs and similar, implementation

Path Canonization

*special problem

Help King

implementation, probabilities, trees

Game with Two Trees

Chain Letter

*special problem, dfs and similar, graphs

INI-file

*special problem, implementation

Suffix Subgroup

*special problem, strings

Hungarian Notation

*special problem

Lomsat gelral

data structures, dfs and similar, dsu, trees

The Child and Sequence

data structures, math

A Simple Task

data structures, sortings, strings

Legacy

data structures, graphs, shortest paths

Dominant Indices

data structures, dsu, trees

Sonya and Problem Wihtout a Legend

dp, sortings

Count Pairs

math, matrices, number theory, two pointers

Nearest vectors

geometry, sortings

Physical Education Lessons

data structures, implementation, sortings

Xor-MST

bitmasks, constructive algorithms, data structures

Errich-Tac-Toe (Hard Version)

constructive algorithms, math

Team Building

bitmasks, dp, greedy, sortings

Sasha and Array

data structures, math, matrices

Devu and Flowers

bitmasks, combinatorics, number theory

Rectangle Painting 1

dp

Grid Xor

constructive algorithms, greedy, implementation, interactive, math

Almost Triple Deletions

data structures, dp, greedy

Minimal Labels

data structures, dfs and similar, graphs, greedy

Centroids

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

Antimatter

dp

Bitwise Queries (Hard Version)

bitmasks, constructive algorithms, interactive, math

Placing Rooks

combinatorics, fft, math

Mike and Foam

bitmasks, combinatorics, dp, math, number theory

Double Profiles

graphs, hashing, sortings

Complete the Projects (hard version)

dp, greedy

Complete The Graph

binary search, constructive algorithms, graphs, shortest paths

Anton and School - 2

combinatorics, dp, math, number theory

Trains and Statistic

data structures, dp, greedy

Returning Home

graphs, shortest paths, sortings

Road Improvement

dp, trees

Product Oriented Recurrence

dp, math, matrices, number theory

Another Filling the Grid

combinatorics, dp, math

Prefix Product Sequence

constructive algorithms, math, number theory

Trees of Tranquillity

data structures, dfs and similar, greedy, trees

Garden of the Sun

constructive algorithms, graphs

LuoTianyi and the Floating Islands (Hard Version)

combinatorics, dfs and similar, math, probabilities, trees

Dogeforces

constructive algorithms, data structures, dfs and similar, divide and conquer, dsu, greedy, sortings, trees

Fixed Point Removal

binary search, constructive algorithms, data structures, greedy, two pointers

Tree Array

brute force, combinatorics, dp, graphs, math, probabilities, trees

Keshi in Search of AmShZ

graphs, greedy, shortest paths

388535 (Hard Version)

bitmasks, brute force, data structures, math

Anthem of Berland

dp, strings

MEX Queries

binary search, data structures, trees

Monster Invaders

dp, greedy, implementation

Segment Sum

bitmasks, combinatorics, dp, math

Edges in MST

dfs and similar, dsu, graphs, sortings

Qpwoeirut and Vertices

binary search, data structures, dfs and similar, divide and conquer, dsu, greedy, trees

Omkar and Forest

combinatorics, graphs, math, shortest paths

Asterism (Hard Version)

binary search, combinatorics, dp, math, number theory, sortings

Two Different

constructive algorithms, divide and conquer

Removing Leaves

data structures, greedy, implementation, trees

Tourist Reform

dfs and similar, graphs

Pattern Matching

bitmasks, data structures, dfs and similar, graphs, hashing, sortings, strings

Envy

data structures, dsu, graphs

Another MEX Problem

bitmasks, brute force, dp, shortest paths

Divide Points

constructive algorithms, geometry, math

Divan and Kostomuksha (hard version)

dp, number theory

Hemose in ICPC ?

binary search, dfs and similar, implementation, interactive, math, number theory, trees

Fox And Dinner

flows

Instant Noodles

graphs, hashing, math, number theory

Pairwise Modulo

data structures, math

Voting (Easy Version)

data structures, dp, greedy

Happy Life in University

data structures, dfs and similar, greedy, trees