POJ1222-EXTENDED LIGHTS OUT POJ3279-Fliptile POJ1753-Flip Game 为什么将着三个题放一起讲呢?因为只要搞明白了其中一点,就可以一次3ac了-- 首先讲下每个题目的意思 1.EXTENDED LIGHTS OUT 给你5行6列的01矩阵,0代表该点的灯是关闭的,1代表该点的灯是开着的,要求出每一栈灯是否按下,使得所有的灯都熄灭,当然,按下某一盏灯时,它附近的灯也会变成原来相反的状态,如图所示. 2.Fliptile 一群奶牛,喜欢白色瓷砖…
Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 8481 Accepted: 5479 Description In an extended version of the game Lights Out, is a puzzle with 5 rows of 6 buttons each (the actual puzzle has 5 rows of 5 buttons each). Each button has…
都是简单的异或高斯消元 由于bzoj2466要求解得最小和,所以我们最后还要穷举自由元取最优解 type node=record po,next:longint; end; ..] of longint; a:..,..] of longint; i,x,y,ans,n:longint; procedure swap(var a,b:longint); var c:longint; begin c:=a; a:=b; b:=…