摘要:
DescriptionConsider equations having the following form:a*x1^2+b*x2^2+c*x3^2+d*x4^2=0a, b, c, d are integers from the interval [-50,50] and any of the... 阅读全文
摘要:
DescriptionConsider equations having the following form:a1x13+ a2x23+ a3x33+ a4x43+ a5x53=0The coefficients are given integers from the interval [-50,... 阅读全文
摘要:
大意:告诉你一个矩阵,初始值全部为0,有两种操作,1、告诉你x1,y1, x2, y2 把左上角到右下角的矩形的里面的值全部颠倒 1变0 0变1第二种操作是查询某个点的值是0或1分析:二维的标号法, 对于每一个矩阵只要把它的四个角进行标记就可以了, 最基本的思路跟理工门前的树是一样的举个例子:比如... 阅读全文