摘要： Mr. Funt now lives in a country with a very specific tax laws. The total income of mr. Funt during this year is equal to n (n ≥ 2) burles and the amou 阅读全文

摘要： Description The Department of National Defence (DND) wishes to connect several northern outposts by a wireless network. Two different communication te 阅读全文

摘要： Problem Description XX星球有很多城市，每个城市之间有一条或多条飞行通道，但是并不是所有的路都是很安全的，每一条路有一个安全系数s,s是在 0 和 1 间的实数(包括0，1)，一条从u 到 v 的通道P 的安全度为Safe(P) = s(e1)*s(e2)…*s(ek) e1,e 阅读全文

摘要： Jon fought bravely to rescue the wildlings who were attacked by the white-walkers at Hardhome. On his arrival, Sam tells him that he wants to go to Ol 阅读全文

摘要： Bizon the Champion isn't just attentive, he also is very hardworking. Bizon the Champion decided to paint his old fence his favorite color, orange. Th 阅读全文

摘要： Mr. Panda likes ice cream very much especially the ice cream tower. An ice cream tower consists of K ice cream balls stacking up as a tower. In order 阅读全文

摘要： Description The SUM problem can be formulated as follows: given four lists A, B, C, D of integer values, compute how many quadruplet (a, b, c, d ) ∈ A 阅读全文

摘要： Petya recieved a gift of a string s with length up to 105 characters for his birthday. He took two more empty strings t and u and decided to play a ga 阅读全文

摘要： Squirrel Liss lived in a forest peacefully, but unexpected trouble happens. Stones fall from a mountain. Initially Squirrel Liss occupies an interval  阅读全文

摘要： You are given a tetrahedron. Let's mark its vertices with letters A, B, C and D correspondingly. An ant is standing in the vertex D of the tetrahedron 阅读全文