摘要：
Strange Way to Express Integers Time Limit: 1000MS Memory Limit: 131072K Total Submissions: 19509 Accepted: 6592 Description Elina is reading a book w 阅读全文
摘要：
Visible Lattice Points Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 8397 Accepted: 5144 Description A lattice point (x, y) in the first 阅读全文
摘要：
Surprising Strings Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 7659 Accepted: 4878 Description The D-pairs of a string of letters are t 阅读全文
摘要：
Prime Cuts Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 11961 Accepted: 4553 Description A prime number is a counting number (1, 2, 3, . 阅读全文