摘要：
Red and Black Time Limit: 1000MS Memory Limit: 30000K Total Submissions: 36371 Accepted: 19731 Description There is a rectangular room, covered with s 阅读全文
摘要：
Lake Counting Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 36208 Accepted: 17982 Description Due to recent rains, water has pooled in va 阅读全文
摘要：
Ants Time Limit: 1000MS Memory Limit: 30000K Total Submissions: 19297 Accepted: 8059 Description An army of ants walk on a horizontal pole of length l 阅读全文
摘要：
C. String Reconstruction time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Ivan had string 阅读全文
摘要：
B. Black Square time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Polycarp has a checkered 阅读全文