Deja Vu

constructive algorithms, graphs, implementation

Rivalries

constructive algorithms, data structures, greedy

Omkar and Mosaic

combinatorics, constructive algorithms, math

Decent Division

constructive algorithms, data structures

Princess and Her Shadow

constructive algorithms, shortest paths

Maximum Adjacent Pairs

constructive algorithms, graph matchings

Bugaboo

bitmasks, constructive algorithms, dp, number theory

Lost Nodes

constructive algorithms, dp, graphs, interactive, sortings, trees

DAG

constructive algorithms

Shift It!

constructive algorithms

Missing Subarray Sum

constructive algorithms

Balance the Cards

constructive algorithms, data structures, divide and conquer, geometry, graphs, implementation

Black and White

constructive algorithms

What a Reversal

constructive algorithms

Maximum Permutation

constructive algorithms

Design Tutorial: Learn from a Game

constructive algorithms, implementation

Planar Perimeter

constructive algorithms, graphs

Almost Certainly

*special problem, constructive algorithms, data structures, sortings

Anti-Proxy Attendance

constructive algorithms, dp, interactive, ternary search

Beauty of a Permutation

constructive algorithms, math

Interactive Mex Tree

constructive algorithms, dfs and similar, interactive, trees

Ancient civilizations

constructive algorithms, geometry

Ela and Prime GCD

constructive algorithms, math, number theory

Minimum Segments

constructive algorithms

Xor-quiz

constructive algorithms, dp, interactive, math, number theory

Copium Permutation

constructive algorithms, data structures, greedy

Impressionism

constructive algorithms, graphs, implementation, math

Permutation Weight (Hard Version)

constructive algorithms, greedy

Help BerLine

constructive algorithms

Cube Snake

constructive algorithms

Jumbled Trees

constructive algorithms, math

Unequal Adjacent Elements

constructive algorithms, sortings

Homework

constructive algorithms

Mio and Lucky Array

constructive algorithms, fft, math, strings

Neighbour Ordering

constructive algorithms, graphs

Connected Cubes

constructive algorithms

Koxia, Mahiru and Winter Festival

constructive algorithms

Alpha planetary system

constructive algorithms, graphs, shortest paths

Biome Map

*special problem, constructive algorithms, dfs and similar, graphs

Negative Time Summation

constructive algorithms

Slime and Hats

constructive algorithms, dp, greedy

Flow Optimality

constructive algorithms, flows, math

Parallel Universes

*special problem, constructive algorithms, dfs and similar, dsu, graphs

Four Stones

constructive algorithms

Tree of Life (medium)

constructive algorithms, hashing, trees

Long Recovery

constructive algorithms, dfs and similar

Min-Sum-Max

constructive algorithms, dp, greedy

BinaryStringForces

constructive algorithms, data structures, dp

Public Service

constructive algorithms, graphs, trees

Three Minimums

combinatorics, constructive algorithms, divide and conquer, dp, fft, math

Redundant Routes

constructive algorithms, dp, trees

Dirty plates

constructive algorithms, math

Railway Construction

brute force, constructive algorithms, data structures, graphs, shortest paths

Algoland and Berland

constructive algorithms, divide and conquer, geometry

Parallel Swaps Sort

constructive algorithms, data structures

Intergalactic Sliding Puzzle

combinatorics, constructive algorithms, math

Excursions

*special problem, constructive algorithms, dfs and similar, flows, graph matchings, graphs

Cactus Transformation

constructive algorithms

Longest Saw

*special problem, constructive algorithms

Growing Trees

binary search, constructive algorithms, flows, graphs, greedy

Scissors and Tape

*special problem, constructive algorithms, geometry

Draw Polygon Lines

*special problem, constructive algorithms, dp, geometry, interactive