1.kmp产生的next数组: 最小循环节(长度)=len-next[len]; 证明: ----------------------- ----------------------- k m x j i 由上,next[i]=j,两段红色的字符串相等(两个字符串完全相等),s[k....j]==s[m....i] 设s[x...j]=s[j....i](xj=ji) 则可得,以下简写字符串表达方式 kj=kx+xj; mi=mj+ji; 因为xj=ji,所…
Power Strings Time Limit: 3000MS Memory Limit: 65536K Total Submissions: 33178 Accepted: 13792 Description Given two strings a and b we define a*b to be their concatenation. For example, if a = "abc" and b = "def" then a*b = "…
题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=3746 Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Problem Description CC always becomes very depressed at the end of this month, he has checked his credit card yesterd…