摘要：
Zhenya moves from parents Time limit: 1.0 secondMemory limit: 64 MB Zhenya moved from his parents’ home to study in other city. He didn’t take any cas 阅读全文
摘要：
Directed Roads time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Directed Roads time limit 阅读全文
摘要：
Coloring Trees time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Coloring Trees time limit 阅读全文