cupa专题
【2015-2016 XVI Open CupA】【贪心 确定性思想 正难则反 本身具有拓扑序】Abstract Picture 每行每列各染色一次 恢复颜色方案
A. Abstract Picture time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Famous abstract painter Va Sya plans to start new