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  1. import java.util.*;
  2. import java.lang.*;
  3. import java.io.*;
  4.  
  5.  
  6. final class Number {
  7.     //1-ый способ решение задачи
  8.     public static int swap_set1(int n) {
  9.         byte arr[] = {0, 0, 0, 0, 0, 0, 0, 0, 0};
  10.         int cnt = 0;
  11.  
  12.         arr[cnt++] = 1;
  13.         do {
  14.             arr[cnt++] = (byte) (n % 10);
  15.         } while ((n /= 10) != 0);
  16.         arr[cnt] = 1;
  17.  
  18.         byte tmp = arr[1];
  19.         arr[1] = arr[cnt - 1];
  20.         arr[cnt - 1] = tmp;
  21.  
  22.         n = 0;
  23.         for (int i = cnt; i >= 0; --i)
  24.             n = n * 10 + (int) arr[i];
  25.         return n;
  26.     }
  27.  
  28.     //2-ой способ решение задачи
  29.     public static int swap_set2(int n) {
  30.         int d = 1;
  31.         for (int i = n / 10; i != 0; i /= 10)
  32.             d *= 10;
  33.  
  34.         int m = n % d / 10;
  35.         int w = (d * 10) + (n % 10 * (d / 10) + m) * 10 + n / d;
  36.         return w * 10 + 1;
  37.     }   
  38. }
  39.  
  40.  
  41.  
  42. class Project {
  43. 	public static void main (String[] args) {
  44. 		int n = 234;
  45. 		System.out.println(n);
  46. 		System.out.println(Number.swap_set1(n));
  47. 		System.out.println();
  48.  
  49. 		n = 5678;
  50. 		System.out.println(n);
  51. 		System.out.println(Number.swap_set2(n));    		
  52. 	}
  53. }
Success #stdin #stdout 0.09s 320320KB
comments (?)
stdin 
Standard input is empty
stdout 
234
14321

5678
186751
https://ideone.com/QlkT9A
language:
Java (HotSpot 12)
created:
10 years ago
visibility:
public

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