Min_25

Practice: 

The Best Box, Inverse Binomial Coefficient, Random Number Generator, Easy Queries, Chef and Tree, A Good Problem, Product on the segment by modulo

September Challenge 2014: 

Factorisation

May Challenge 2016: 

Sereja and GCD 2, Easy Queries, Chef and math, Chef and Balls, Forest Gathering, Chef and Amazingness of Numbers, Chef and Big Soccer, Laddu, Roads in Stars

July Challenge 2016: 

Andrash and Stipendium, Chef and Segments, Chef and Tetris, Chef and special numbers, Evaluate the polynomial, Chef and Robots Competition, Chefland and Electricity, Chef and Polyhedron, Defend the Recipe, Scheduling jobs on a cluster

August Challenge 2016: 

Chef and His Garden, Chef and Circle Run, Chef and Chocolate, Chef and Round Run, Funny gnomes, Maximum Grid, Chef and Guard Towers, Chef and Tree, A Good Problem

September Challenge 2016: 

Chef and Friends, Dividing Machine, Chef has a Spaghetti Garden, Chef and Matrix Division, Chef and digits of a number, Faded Palindromes, The New Restaurant, JosephLand, Chef and calculation, Chef and Cut

October Challenge 2016: 

Sereja and Progressions, Sereja and Stones, Chef and Keyboard, Big Queries, Fenwick Iterations, Chef and Three Dogs, Power Sums, Chef and Two String, Tree Balancing, Bear and Shuffled Points

November Challenge 2016: 

Count Permutations, Friends Meeting, Urban Development, Gift and Chef, Kirito in Memeland, Chef and squares, Chef and Bike, Sereja and Permutations 3, Task for Alexey

December Challenge 2016: 

Train Partner, Kth Max Subarray, Chef and Finding Direction, Sereja and Increasing subsequence, Kirito in labyrinth, Edit Distance Revisited, Roses for Alexey, Advanced Cooking Machine, Our Base is Under Attack, Bear and Three Colours

January Challenge 2017: 

Capital Movement, Cats and Dogs, Sereja and BOX, Coprime 6-tuples, Chef and Circle, Fantastic Four, Digits Cannot Separate, Reservior, Tourists in Mancunia

June Challenge 2017: 

Persistent oak, Chef and Prime Queries, Saboteur (Challenge), Euler Sum, A Good Set, Cloning, Chef and the Feast, Xenny and Coin Rankings, Triplets, Pairwise union of sets

July Challenge 2017: 

Chef and Sign Sequences, Irrational Root, Pishty and tree, Multiplication Program, Tree Expectancy, Whats in the Name, Calculator , IPC Trainers, Two Coins

November Challenge 2017: 

Product on the segment by modulo , Day Schedule, Chef Hates Palindromes, Polynomials, Chef and Subarray Queries, Chef goes Left Right Left, Lovers Gift, Periodic Palindrome Construction, Villages and Tribes

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