📜  打印比其大N的所有排列

📅  最后修改于: 2021-06-25 11:37:50             🧑  作者: Mango

给定数字N ,我们的任务是打印大于N的整数N的排列。
例子:

方法:为解决此问题,我们可以使用C++中的next_permutation()方法来获得N在字典上的所有较大排列。获取所有此类数字后,将它们打印出来。
对于其他语言,找到数字N的排列并打印大于N的数字。
下面是上述方法的实现:

C++
// C++ implementation to print all the
// permutation greater than the integer N
 
#include 
using namespace std;
 
// Function to print all the permutation
// which are greater than N itself
void printPermutation(int N)
{
    int temp = N, count = 0;
 
    // Iterate and count the
    // number of digits in N
    while (temp > 0) {
        count++;
        temp /= 10;
    }
 
    // vector to print the
    // permutations of N
    vector num(count);
 
    // Store digits of N
    // in the vector num
    while (N > 0) {
        num[count-- - 1] = N % 10;
        N = N / 10;
    }
 
    // Iterate over every permutation of N
    // which is greater than N
    while (next_permutation(
        num.begin(), num.end())) {
 
        // Print the current permutaion of N
        for (int i = 0; i < num.size(); i++)
            cout << num[i];
 
        cout << "\n";
    }
}
 
// Driver Code
int main()
{
    int N = 324;
 
    printPermutation(N);
 
    return 0;
}


Java
// Java implementation to print all the
// permutation greater than the integer N
import java.util.*;
class GFG{
 
static void printPermutation(int N)
{
    int temp = N, count = 0;
 
    // Iterate and count the
    // number of digits in N
    while (temp > 0)
    {
      count++;
      temp /= 10;
    }
 
    // vector to print the
    // permutations of N
    int[] num = new int[count];
 
    // Store digits of N
    // in the vector num
    while (N > 0)
    {
      num[count-- - 1] = N % 10;
      N = N / 10;
    }
 
    // Iterate over every permutation of N
    // which is greater than N
    while (next_permutation(num))
    {
 
      // Print the current permutaion of N
      for (int i = 0; i < num.length; i++)
        System.out.print(num[i]);
 
      System.out.print("\n");
    }
  }
 
  // Function to print all the permutation
  // which are greater than N itself
  static boolean next_permutation(int[] p)
  {
    for (int a = p.length - 2; a >= 0; --a)
      if (p[a] < p[a + 1])
        for (int b = p.length - 1;; --b)
          if (p[b] > p[a])
          {
            int t = p[a];
            p[a] = p[b];
            p[b] = t;
            for (++a, b = p.length - 1; a < b; ++a, --b)
            {
              t = p[a];
              p[a] = p[b];
              p[b] = t;
            }
            return true;
          }
    return false;
  }
 
// Driver Code
public static void main(String[] args)
{
  int N = 324;
 
  printPermutation(N);
}
}
 
// This code contributed by sapnasingh4991


C#
// C# implementation to print all the
// permutation greater than the integer N
using System;
class GFG{
 
static void printPermutation(int N)
{
    int temp = N, count = 0;
 
    // Iterate and count the
    // number of digits in N
    while (temp > 0)
    {
      count++;
      temp /= 10;
    }
 
    // vector to print the
    // permutations of N
    int[] num = new int[count];
 
    // Store digits of N
    // in the vector num
    while (N > 0)
    {
      num[count-- - 1] = N % 10;
      N = N / 10;
    }
 
    // Iterate over every permutation of N
    // which is greater than N
    while (next_permutation(num))
    {
 
      // Print the current permutaion of N
      for (int i = 0; i < num.Length; i++)
        Console.Write(num[i]);
 
      Console.Write("\n");
    }
  }
 
  // Function to print all the permutation
  // which are greater than N itself
  static bool next_permutation(int[] p)
  {
    for (int a = p.Length - 2; a >= 0; --a)
      if (p[a] < p[a + 1])
        for (int b = p.Length - 1;; --b)
          if (p[b] > p[a])
          {
            int t = p[a];
            p[a] = p[b];
            p[b] = t;
            for (++a, b = p.Length - 1;
                       a < b; ++a, --b)
            {
              t = p[a];
              p[a] = p[b];
              p[b] = t;
            }
            return true;
          }
    return false;
  }
 
// Driver Code
public static void Main(String[] args)
{
  int N = 324;
 
  printPermutation(N);
}
}
 
// This code is contributed by Rohit_ranjan


输出:
342
423
432