time limit per test2 seconds memory limit per test256 megabytes inputstandard input outputstandard output You are given a string s, consisting of lowercase English letters, and the integer m. One should choose some symbols from the given string so th…
time limit per test2 seconds memory limit per test256 megabytes inputstandard input outputstandard output While Mahmoud and Ehab were practicing for IOI, they found a problem which name was Longest common subsequence. They solved it, and then Ehab ch…
time limit per test3 seconds memory limit per test256 megabytes inputstandard input outputstandard output A string t is called nice if a string "2017" occurs in t as a subsequence but a string "2016" doesn't occur in t as a subsequence…
time limit per test2 seconds memory limit per test256 megabytes inputstandard input outputstandard output Kevin has just recevied his disappointing results on the USA Identification of Cows Olympiad (USAICO) in the form of a binary string of length n…
time limit per test2 seconds memory limit per test256 megabytes inputstandard input outputstandard output Little Alyona is celebrating Happy Birthday! Her mother has an array of n flowers. Each flower has some mood, the mood of i-th flower is ai. The…
time limit per test2 seconds memory limit per test256 megabytes inputstandard input outputstandard output When Xellos was doing a practice course in university, he once had to measure the intensity of an effect that slowly approached equilibrium. A g…
time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output A long time ago, in a galaxy far far away two giant IT-corporations Pineapple and Gogol continue their fierce competition. Crucial moment is…
time limit per test2 seconds memory limit per test256 megabytes inputstandard input outputstandard output Professor GukiZ doesn't accept string as they are. He likes to swap some letters in string to obtain a new one. GukiZ has strings a, b, and c. H…
time limit per test1 second memory limit per test256 megabytes inputstandard input outputstandard output Nothing is eternal in the world, Kostya understood it on the 7-th of January when he saw partially dead four-color garland. Now he has a goal to…
time limit per test1 second memory limit per test256 megabytes inputstandard input outputstandard output You are given an array of positive integers a1, a2, -, an × T of length n × T. We know that for any i > n it is true that ai = ai - n. Find the l…
time limit per test2 seconds memory limit per test256 megabytes inputstandard input outputstandard output Mahmoud wrote a message s of length n. He wants to send it as a birthday present to his friend Moaz who likes strings. He wrote it on a magical…
