Pashmak and Flowers

combinatorics, implementation, sortings

Random Teams

combinatorics, constructive algorithms, greedy, math

K-th Beautiful String

binary search, brute force, combinatorics, implementation, math

Dreamoon and WiFi

bitmasks, brute force, combinatorics, dp, math, probabilities

Domino on Windowsill

combinatorics, constructive algorithms, math

Customising the Track

combinatorics, greedy, math

Yet Another Broken Keyboard

combinatorics, dp, implementation

JOE is on TV!

combinatorics, greedy, math

Dictionary

combinatorics, math

Tavas and SaDDas

bitmasks, brute force, combinatorics, implementation

Contest Start

combinatorics, geometry, greedy, math

AND 0, Sum Big

bitmasks, combinatorics, math

Ball in Berland

combinatorics, graphs, math

Mashmokh and ACM

combinatorics, dp, number theory

Pasha and Stick

combinatorics, math

Marin and Anti-coprime Permutation

combinatorics, math, number theory

Two Round Dances

combinatorics, math

Combinatorics Homework

combinatorics, greedy, math

Lucky Numbers

combinatorics, math

Luntik and Subsequences

combinatorics, math

Infinite Replacement

combinatorics, implementation, strings

Permutation Partitions

combinatorics, greedy, math

Chocolate

combinatorics

Cyclic Permutations

combinatorics, dp, graphs, math

Points on Line

binary search, combinatorics, two pointers

Silent Classroom

combinatorics, greedy

Running for Gold

combinatorics, graphs, greedy, sortings

CQXYM Count Permutations

combinatorics, math, number theory

Far Relative’s Birthday Cake

brute force, combinatorics, constructive algorithms, implementation

Reorder the Array

combinatorics, data structures, math, sortings, two pointers

Kuroni and Impossible Calculation

brute force, combinatorics, math, number theory

AND Sequences

bitmasks, combinatorics, constructive algorithms, math

Close Tuples (easy version)

binary search, combinatorics, math, sortings, two pointers

Little Alawn's Puzzle

combinatorics, dp, dsu, graphs, math

The Number of Products

combinatorics, dp, implementation

Advertising Agency

combinatorics, math, sortings

Two Arrays

combinatorics, dp

Carrying Conundrum

bitmasks, combinatorics, dp, math

New Year and Ascent Sequence

binary search, combinatorics, data structures, dp, implementation, sortings

Ciel and Flowers

combinatorics, math

Kolya and Tanya

combinatorics

Tiles

combinatorics, greedy, math

Alice and the List of Presents

combinatorics, math

Wet Shark and Bishops

combinatorics, implementation

Jury Meeting

combinatorics, math

Binary Search

binary search, combinatorics

Substring Removal

combinatorics, math, strings

Rubik's Cube Coloring (easy version)

combinatorics, math

Pocket Book

combinatorics

Ayoub and Lost Array

combinatorics, dp, math

Minimum number of steps

combinatorics, greedy, implementation, math

Modulo Sum

combinatorics, data structures, dp, two pointers

The World is a Theatre

combinatorics, math

Weird Sum

combinatorics, data structures, geometry, math, matrices, sortings

Ayoub's function

binary search, combinatorics, greedy, math, strings

Zigzags

brute force, combinatorics, data structures, math, two pointers

Bus Video System

combinatorics, math

Divan and bitwise operations

bitmasks, combinatorics, constructive algorithms, dp, math

Count the Arrays

combinatorics, math

Count The Blocks

combinatorics, dp, math

Kyoya and Colored Balls

combinatorics, dp, math

Submarine in the Rybinsk Sea (easy edition)

combinatorics, math, number theory

Kavi on Pairing Duty

combinatorics, dp, math

Bargain

combinatorics, dp, math

Close Tuples (hard version)

binary search, combinatorics, implementation, math, sortings, two pointers

Moamen and XOR

bitmasks, combinatorics, dp, math, matrices

New Year and Permutation

combinatorics, math

Beautiful Numbers

brute force, combinatorics

Radio Towers

combinatorics, dp, math

Leha and Function

combinatorics, greedy, math, number theory, sortings

Tennis Championship

combinatorics, constructive algorithms, greedy, math

Training Session

combinatorics, data structures, geometry, implementation, math

The Fair Nut and String

combinatorics, dp, implementation

Ivan the Fool and the Probability Theory

combinatorics, dp, math

Unbearable Controversy of Being

brute force, combinatorics, dfs and similar, graphs

Rescue Nibel!

combinatorics, data structures, sortings

Colorful Bricks

combinatorics, dp, math

Classy Numbers

combinatorics, dp

Dreamoon Likes Sequences

bitmasks, combinatorics, math

New Year and the Permutation Concatenation

combinatorics, dp, math

Rectangles

combinatorics, math

Vanya and Label

bitmasks, combinatorics, implementation, strings

Hamming Distance Sum

combinatorics, strings

Pashmak and Buses

combinatorics, constructive algorithms, math

Ilya and Escalator

combinatorics, dp, math, probabilities

Selection of Personnel

combinatorics, math

Divide and Sum

combinatorics, math, sortings

Almost Identity Permutations

combinatorics, dp, math

Maximize the Intersections

combinatorics, constructive algorithms, geometry, greedy, sortings

AB-string

binary search, combinatorics, dp, strings

Number Of Permutations

combinatorics

Modular Stability

combinatorics, math, number theory

Santa's Bot

combinatorics, math, probabilities

Little Elephant and Interval

binary search, combinatorics, dp

Makes And The Product

combinatorics, implementation, math, sortings

Wet Shark and Flowers

combinatorics, math, number theory, probabilities

Monotonic Renumeration

combinatorics, sortings

Number of Simple Paths

combinatorics, dfs and similar, graphs, trees

Gerald and Giant Chess

combinatorics, dp, math, number theory

Asterism (Easy Version)

binary search, brute force, combinatorics, math, number theory, sortings