摘要：
Discription Given a permutation a1, a2, … aN of {1, 2, …, N}, we define its E-value as the amount of elements where ai > i. For example, the E-value o 阅读全文
摘要：
Read problems statements in Mandarin Chinese and Russian. Rin is attending a university. She has M semesters to finish her program, and that program h 阅读全文