topcoder 694题目A rigorous teacher makes all his students stand in a line before entering the classroom. Being a rigorous teacher, he makes the students line up in non-descending order by height. One time, while the students were lining up, the teacher

topcoder 694题目3 Strange abbreviations are often used to write text messages on uncomfortable mobile devices. One particular strategy for encoding texts composed of alphabetic characters and spaces is the following: Spaces are maintained, and ea

topcoder 698 题目 John and Brus are bored. They have n+m common friends. The first n of them are bored and other m are not. John chooses the j-th (1-based) friend for a talk. If the friend is not bored, he becomes bored after the talk. Brus does the sa