Educational Codeforces Round 131 (Rated for Div. 2) A-D题解
题目A.GrassFieldB.PermutationC.ScheduleManagementD.PermutationRestorationA.GrassField题解:(1)若四个位置全是1,则输出2(2)若全为0则输出0,(3)其他情况都输出1/*author:Mzx*/#includeusingnamespacestd;typedeflonglongll;typedeflongdouble