用 C++ 计算相同字符串的最小旋转次数
问题陈述
给定一个字符串,我们需要找到使字符串相同的所需最小旋转次数
示例
如果输入字符串为“bbbbb”,则至少需要旋转 1 次
算法
1. Initialize result = 0 2. Make a temporary string equals to original string concatenated with itself. 3. Take the substring of temporary string of size same as original string starting from second character i.e. index 1 4. Increment the counter 5. Check whether the substring becomes equal to original string. If yes, then break the loop. Else go to step 2 and repeat it from the next index
示例
#include <bits/stdc++.h>
using namespace std;
int getRotationCount(string str) {
string temp = str + str;
int n = str.length();
for (int i = 1; i <= n; ++i) {
string sub = temp.substr(i, str.size());
if (str == sub) {
return i;
}
}
return n;
}
int main() {
string str = "bbbbb";
cout << "Rotation count = " << getRotationCount(str) <<
endl;
return 0;
}在编译并执行上述程序时,将生成以下输出
输出
Rotation count = 1
广告
数据结构
网络
关系型数据库管理系统
操作系统
Java
iOS
HTML
CSS
Android
Python
C 编程
C++
C#
MongoDB
MySQL
Javascript
PHP