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  1. import java.util.*;
  2. import java.lang.*;
  3. import java.io.*;
  4.  
  5. class Main
  6. {
  7. 	public static int k, d, quantity = 0;
  8. 	public static long[] was = new long[40320];
  9. 	public static long[] nums = new long[9];
  10. 	public static boolean Was(long h) {
  11.     	long c = 0;
  12.     	for (int i = 0; i < quantity; i++) {
  13.         	if (was[i] == h) c++;
  14.     	}
  15.     	if (c == 0) {
  16.         	was[quantity] = h;
  17.         	return true; 
  18.     	}
  19.     	else
  20.     	return false;
  21. 	}
  22. 	public static void Swap(int a, int b) {
  23.     	long t = nums[a];
  24.     	nums[a] = nums[b];
  25.     	nums[b] = t;
  26. 	}
  27. 	public static void Generate(int n) {
  28. 	    if (n == k) {
  29. 	        long sum = 0;
  30. 	        long p = 1;
  31. 	        long h = 0;
  32. 	        long hash = 1;
  33. 	        for (int i = k - 1; i >= 0; i--) {
  34. 	            long subs = nums[i];
  35. 	            sum += nums[i] % d * p;
  36. 	            p *= Math.pow(10, (long)Math.log10(nums[i]) + 1);
  37. 	            p = p % d;
  38. 	            while (subs!= 0) {
  39. 	                h += subs % 10 * hash;
  40. 	                hash *= 101;
  41. 	                subs /= 10;
  42. 	            }
  43. 	        }   
  44. 	        if (sum%d == 0 && Was(h) == true) {
  45. 	            quantity++; 
  46. 	        }
  47. 	    }
  48. 	    else { 
  49. 	        for(int j = n; j < k;j++) {
  50. 	            Swap(n,j);
  51. 	            Generate(n+1);
  52. 	            Swap(n,j);
  53. 	        }
  54. 	    }   
  55. 	}
  56. 	public static void main (String[] args) throws java.lang.Exception
  57. 	{
  58. 		Scanner in = new Scanner(System.in);
  59. 		d = in.nextInt();
  60. 		k = in.nextInt();
  61.     	for(int i = 0; i < k; i++) {
  62.     		nums[i] = in.nextLong();
  63.     	}
  64.     	Generate(0);
  65.     	System.out.println(quantity);
  66. 	}
  67. }
Success #stdin #stdout 0.11s 2184192KB
comments (?)
stdin
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71 8
4018916609
7495223237
3405637482
3166003637
8998228133
1141886496
9124347310
7736090711
stdout
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584
https://ideone.com/gv2pXg
language:
Java (HotSpot 12)
created:
6 years ago
visibility:
public

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