Joyful HDU - 5245 概率问题
摘要：
Sakura has a very magical tool to paint walls. One day, kAc asked Sakura to paint a wall that looks like an M×NM×N matrix. The wall has M×NM×N squares 阅读全文
posted @ 2018-11-20 21:49 九月旧约 阅读(146) 评论(0) 推荐(0) 编辑
