题目:http://www.lydsy.com/JudgeOnline/problem.php?id=2299题解:乱搞就可以了。。。不妨认为有用的只有(a,b)(a,-b)(b,a)(b,-a)然后设他们的系数分别为x1,x2,x3,x4,则有(x1+x2)*a+(x3+x4)*b=x(x1-x2... Read More
posted @ 2015-01-30 11:02 ZYF-ZYF Views(329) Comments(0) Diggs(0) Edit