给定一个字符串S，任务是加密的字符串，并再次解密字符串到原来的形式。
加密技术：如果L是字符串的长度，则取两个值，一个为＆Sqrt; L的ceil(例如b)，另一个为＆Sqrt; L的底面(例如a)，然后使二维矩阵具有行= a，列= b。
如果row * columns 
解密技术：如果L是加密字符串的长度，则再次找到两个值a和b，其中a是＆Sqrt; L的ceil值，b是＆Sqrt; L的下限值。类似地，创建一个2D矩阵，其中将字符串列存储，并按行读取矩阵以获取原始形式的字符串。 
加密方式：
- 找到字符串的长度L。
- 找到＆Sqrt; Length的ceil和floor值，并将它们分配给变量。
- 检查两个变量的乘积是否> =长度，如果不是，则将值较小的变量加1。
- 创建一个2D矩阵，并逐行填充字符串的字符。
- 逐列读取矩阵以获取加密的字符串。
解密方式：
- 找到字符串的长度L。
- 找到＆Sqrt; Length的ceil和floor值，并将它们分配给变量。
- 创建2D矩阵，并按列字符串的字符填充矩阵。
- 逐行读取矩阵以获取解密的字符串。
下面是上述方法的实现：
C++
// C++ implementation for Custom
// Encryption and Decryption of String
#include
using namespace std;
// Function to encrypt the string
string encryption(string s)
{
int l = s.length();
int b = ceil(sqrt(l));
int a = floor(sqrt(l));
string encrypted;
if (b * a < l) {
if (min(b, a) == b) {
b = b + 1;
}
else {
a = a + 1;
}
}
// Matrix to generate the
// Encrypted String
char arr[a][b];
memset(arr, ' ', sizeof(arr));
int k = 0;
// Fill the matrix row-wise
for (int j = 0; j < a; j++) {
for (int i = 0; i < b; i++) {
if (k < l){
arr[j][i] = s[k];
}
k++;
}
}
// Loop to generate
// encrypted string
for (int j = 0; j < b; j++) {
for (int i = 0; i < a; i++) {
encrypted = encrypted +
arr[i][j];
}
}
return encrypted;
}
// Function to decrypt the string
string decryption(string s){
int l = s.length();
int b = ceil(sqrt(l));
int a = floor(sqrt(l));
string decrypted;
// Matrix to generate the
// Encrypted String
char arr[a][b];
memset(arr, ' ', sizeof(arr));
int k = 0;
// Fill the matrix column-wise
for (int j = 0; j < b; j++) {
for (int i = 0; i < a; i++) {
if (k < l){
arr[j][i] = s[k];
}
k++;
}
}
// Loop to generate
// decrypted string
for (int j = 0; j < a; j++) {
for (int i = 0; i < b; i++) {
decrypted = decrypted +
arr[i][j];
}
}
return decrypted;
}
// Driver Code
int main()
{
string s = "Geeks For Geeks";
string encrypted;
string decrypted;
// Encryption of String
encrypted = encryption(s);
cout << encrypted << endl;
// Decryption of String
decrypted = decryption(encrypted);
cout << decrypted;
return 0;
} Java
// Java implementation for Custom
// Encryption and Decryption of String
class GFG
{
// Function to encrypt the String
static String encryption(char[] s)
{
int l = s.length;
int b = (int) Math.ceil(Math.sqrt(l));
int a = (int) Math.floor(Math.sqrt(l));
String encrypted = "";
if (b * a < l)
{
if (Math.min(b, a) == b)
{
b = b + 1;
}
else
{
a = a + 1;
}
}
// Matrix to generate the
// Encrypted String
char [][]arr = new char[a][b];
int k = 0;
// Fill the matrix row-wise
for (int j = 0; j < a; j++)
{
for (int i = 0; i < b; i++)
{
if (k < l)
{
arr[j][i] = s[k];
}
k++;
}
}
// Loop to generate
// encrypted String
for (int j = 0; j < b; j++)
{
for (int i = 0; i < a; i++)
{
encrypted = encrypted +
arr[i][j];
}
}
return encrypted;
}
// Function to decrypt the String
static String decryption(char []s)
{
int l = s.length;
int b = (int) Math.ceil(Math.sqrt(l));
int a = (int) Math.floor(Math.sqrt(l));
String decrypted="";
// Matrix to generate the
// Encrypted String
char [][]arr = new char[a][b];
int k = 0;
// Fill the matrix column-wise
for (int j = 0; j < b; j++)
{
for (int i = 0; i < a; i++)
{
if (k < l)
{
arr[j][i] = s[k];
}
k++;
}
}
// Loop to generate
// decrypted String
for (int j = 0; j < a; j++)
{
for (int i = 0; i < b; i++)
{
decrypted = decrypted +
arr[i][j];
}
}
return decrypted;
}
// Driver Code
public static void main(String[] args)
{
String s = "Geeks For Geeks";
String encrypted;
String decrypted;
// Encryption of String
encrypted = encryption(s.toCharArray());
System.out.print(encrypted +"\n");
// Decryption of String
decrypted = decryption(encrypted.toCharArray());
System.out.print(decrypted);
}
}
// This code is contributed by PrinciRaj1992Python3
# Python3 implementation for Custom
# Encryption and Decryption of String
from math import ceil,floor,sqrt
# Function to encrypt the
def encryption(s):
l = len(s)
b = ceil(sqrt(l))
a = floor(sqrt(l))
encrypted=""
if (b * a < l):
if (min(b, a) == b):
b = b + 1
else:
a = a + 1
# Matrix to generate the
# Encrypted String
arr = [[' ' for i in range(a)] for j in range(b)]
k = 0
# Fill the matrix row-wise
for j in range(a):
for i in range(b):
if (k < l):
arr[j][i] = s[k]
k += 1
# Loop to generate
# encrypted
for j in range(b):
for i in range(a):
encrypted = encrypted + arr[i][j]
return encrypted
# Function to decrypt the
def decryption(s):
l = len(s)
b = ceil(sqrt(l))
a = floor(sqrt(l))
decrypted=""
# Matrix to generate the
# Encrypted String
arr = [[' ' for i in range(a)] for j in range(b)]
k = 0
# Fill the matrix column-wise
for j in range(b):
for i in range(a):
if (k < l):
arr[j][i] = s[k]
k += 1
# Loop to generate
# decrypted
for j in range(a):
for i in range(b):
decrypted = decrypted + arr[i][j]
return decrypted
# Driver Code
s = "Geeks For Geeks"
encrypted=""
decrypted=""
# Encryption of String
encrypted = encryption(s)
print(encrypted)
# Decryption of String
decrypted = decryption(encrypted)
print(decrypted)
# This code is contributed by mohit kumar 29C#
// C# implementation for Custom
// Encryption and Decryption of String
using System;
class GFG
{
// Function to encrypt the String
static String encryption(char[] s)
{
int l = s.Length;
int b = (int) Math.Ceiling(Math.Sqrt(l));
int a = (int) Math.Floor(Math.Sqrt(l));
String encrypted = "";
if (b * a < l)
{
if (Math.Min(b, a) == b)
{
b = b + 1;
}
else
{
a = a + 1;
}
}
// Matrix to generate the
// Encrypted String
char [,]arr = new char[a, b];
int k = 0;
// Fill the matrix row-wise
for (int j = 0; j < a; j++)
{
for (int i = 0; i < b; i++)
{
if (k < l)
{
arr[j, i] = s[k];
}
k++;
}
}
// Loop to generate
// encrypted String
for (int j = 0; j < b; j++)
{
for (int i = 0; i < a; i++)
{
encrypted = encrypted +
arr[i, j];
}
}
return encrypted;
}
// Function to decrypt the String
static String decryption(char []s)
{
int l = s.Length;
int b = (int) Math.Ceiling(Math.Sqrt(l));
int a = (int) Math.Floor(Math.Sqrt(l));
String decrypted="";
// Matrix to generate the
// Encrypted String
char [,]arr = new char[a, b];
int k = 0;
// Fill the matrix column-wise
for (int j = 0; j < b; j++)
{
for (int i = 0; i < a; i++)
{
if (k < l)
{
arr[j, i] = s[k];
}
k++;
}
}
// Loop to generate
// decrypted String
for (int j = 0; j < a; j++)
{
for (int i = 0; i < b; i++)
{
decrypted = decrypted +
arr[i, j];
}
}
return decrypted;
}
// Driver Code
public static void Main(String[] args)
{
String s = "Geeks For Geeks";
String encrypted;
String decrypted;
// Encryption of String
encrypted = encryption(s.ToCharArray());
Console.Write(encrypted +"\n");
// Decryption of String
decrypted = decryption(encrypted.ToCharArray());
Console.Write(decrypted);
}
}
// This code is contributed by PrinciRaj1992输出：
Gsree keFGskoe
Geeks For Geeks