摘要: 题目链接:http://www.lydsy.com/JudgeOnline/problem.php?id=1041 ${x^{2}+y^{2}=r^{2} }$ ${\Rightarrow y^{2}=(r-x)(r+x)}$ 令${d=gcd(r-x,r+x)}$ 则${y^{2}=d^{2}*\ 阅读全文
posted @ 2017-04-21 16:18 №〓→龙光← 阅读(319) 评论(0) 推荐(0) 编辑