摘要：
C. Polycarp at the Radio time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output C. Polycarp at 阅读全文
摘要：
D. Lakes in Berland time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output The map of Berland i 阅读全文