为何scanf("%s", str)不需要&运算 经常忘掉的字符串知识点,最好不加&,不加&最标准,指针如果像scanf里一样加&是错的,大概是未定义行为 马拉车 #include<iostream> #include<cstdio> #include<algorithm> #include<cstring> #include<cmath> #include<queue> using…

后缀家族已知成员         后缀树         后缀数组         后缀自动机         后缀仙人掌         后缀预言         后缀Splay ? 后缀树是后缀数组和后缀自动机的祖先? 功能还是比较强大的,在回文串或者字典序方面还是有用处. 而且现在已经有了线性的建树方法. (但其实我也没用过后缀树.)下面对比后缀自动机和后缀数组     单个字符串问题                                                     …

题目: https://loj.ac/problem/6173 分析: 考虑枚举宽度w,然后把宽度压位集中,将它们哈希 (这是w=2的时候) 然后可以写一下string=“ac#bc” 然后就是求这个string本质不同的字符串个数(要去掉连接符#) 这个可以用后缀数组/后缀自动机解决 小技巧:每个连接符用不同的整数表示,那么去做height的时候就不会把连接符包含进去 后缀数组解决的时间复杂度:O(n^3logn)…

Given a string, we need to find the total number of its distinct substrings. Input \(T-\) number of test cases. \(T<=20\); Each test case consists of one string, whose length is \(<=1000\) Output For each test case output one number saying the numbe…

DISUBSTR - Distinct Substrings no tags  Given a string, we need to find the total number of its distinct substrings. Input T- number of test cases. T<=20; Each test case consists of one string, whose length is <= 1000 Output For each test case outpu…

Distinct Substrings 题意 求一个字符串有多少个不同的子串. 分析 又一次体现了后缀数组的强大. 因为对于任意子串,一定是这个字符串的某个后缀的前缀. 我们直接去遍历排好序后的后缀字符串(也就是 \(sa\) 数组),每遍历到一个后缀字符串,会新添数量为这个后缀字符串的长度的前缀,但是要减去 \(height[i]\),即公共前缀的长度,因为前面已经添加过了这个数量的前缀串. code #include<bits/stdc++.h> using namespace std;…

Given a string, we need to find the total number of its distinct substrings. Input T- number of test cases. T<=20;Each test case consists of one string, whose length is <= 1000 Output For each test case output one number saying the number of distinc…

给定一个字符串,求不相同的子串的个数. 假如给字符串“ABA";排列的子串可能: A B A AB  BA ABA 共3*(3+1)/2=6种; 后缀数组表示时: A ABA BA 对于A和AB height[i]=1; 表明一个长度公共,所以ABA中多出现了A这个子串,所以6-1=5: 对于ABA BA height[i]=0,所以不需要减去. 最后答案为5: #include<iostream> #include<stdio.h> #include<string…

Given a string, we need to find the total number of its distinct substrings. Input T- number of test cases. T<=20;Each test case consists of one string, whose length is <= 1000 Output For each test case output one number saying the number of distinc…

SPOJ694 DISUBSTR 题目描述: Given a string, we need to find the total number of its distinct substrings. 输入格式: T- number of test cases. T<=20; Each test case consists of one string, whose length is <= 1000 输出格式: For each test case output one number sayin…