摘要：
题目链接： D. Tree Construction D. Tree Construction time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard 阅读全文
摘要：
题目链接： B. Restoring Painting time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output time limit pe 阅读全文
摘要：
题目链接： A. Infinite Sequence time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output time limit per 阅读全文