摘要：
Problem description One day Ms Swan bought an orange in a shop. The orange consisted of n·k segments, numbered with integers from 1 to n·k. There were 阅读全文
摘要：
Problem description Dima loves representing an odd number as the sum of multiple primes, and Lisa loves it when there are at most three primes. Help t 阅读全文
摘要：
Problem description Hooray! Berl II, the king of Berland is making a knight tournament. The king has already sent the message to all knights in the ki 阅读全文
摘要：
Problem description In the evening, after the contest Ilya was bored, and he really felt like maximizing. He remembered that he had a set of n sticks 阅读全文
摘要：
Problem description SmallR is an archer. SmallR is taking a match of archer with Zanoes. They try to shoot in the target in turns, and SmallR shoots f 阅读全文
摘要：
Problem description The weather is fine today and hence it's high time to climb the nearby pine and enjoy the landscape. The pine's trunk includes sev 阅读全文
摘要：
Problem description After winning gold and silver in IOI 2014, Akshat and Malvika want to have some fun. Now they are playing a game on a grid made of 阅读全文
摘要：
Problem description Being a nonconformist, Volodya is displeased with the current state of things, particularly with the order of natural numbers (nat 阅读全文
摘要：
Problem description Vasya works as a DJ in the best Berland nightclub, and he often uses dubstep music in his performance. Recently, he has decided to 阅读全文