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  1. import java.util.Scanner;
  2. import java.util.*;
  3.  
  4. public class Main {
  5. 	public static void main (String[] args) {
  6. 		Scanner scanner = new Scanner(System.in);
  7. 		int n = scanner.nextInt();
  8. 		double s0 = scanner.nextDouble();
  9. 		double s = scanner.nextDouble();
  10. 		double [] A = new double[n];
  11. 		double [] B = new double[n];
  12. 		if(s0>=s)
  13. 			System.out.println(0);
  14. 		else if(n==0)
  15. 			System.out.println(-1);
  16. 		else
  17. 		{
  18. 		    for(int i=0; i<n; i++)
  19. 		    {
  20. 		        double a = scanner.nextDouble();
  21. 		        A[i]=a;
  22. 		        B[i]=A[i];
  23. 		    }
  24. 		    Arrays.sort(B);
  25. 		    int ans=0;
  26. 		    for(int i=n-1; i>=1; i--)
  27. 		    {
  28. 		        if(B[i]>=10.1)
  29. 		        {
  30. 		            if((int)(B[i]-5.1)+s0>=s){
  31. 		                ans++;
  32. 		                System.out.println(ans);
  33. 		                System.exit(0);
  34. 		            }
  35. 		            else
  36. 		            {
  37. 		                ans++;
  38. 		                B[i-1]+=(int)(B[i]-5.1);
  39. 		            }
  40. 		        }
  41. 		        else
  42. 		        {
  43. 		            break;
  44. 		        }
  45. 		    }
  46. 		    if((B[0]>=10.1)&&((int)(B[0]-5.1)+s0>=s))
  47. 		        System.out.println(ans+1);
  48. 		    else
  49. 		    {
  50. 		        Arrays.sort(A);
  51. 		        if(s0>=10.1)
  52. 		        {
  53. 		            A[n-1]+=(int)(s0-5.1);
  54. 		            s0-=(int)(s0-5.1);
  55. 						s0-=0.1;
  56. 		            ans=1;
  57. 		            for(int i=n-1; i>=1; i--)
  58. 		            {
  59. 		                if(A[i]>=10.1)
  60. 		                {
  61. 		                    if((int)(A[i]-5.1)+s0>=s){
  62. 		                        ans++;
  63. 		                        System.out.println(ans);
  64. 		                        System.exit(0);
  65. 		                    }
  66. 		                    else
  67. 		                    {   
  68. 		                        ans++;
  69. 		                        A[i-1]+=(int)(A[i]-5.1);
  70. 		                    }
  71. 		                }
  72. 		                else
  73. 		                {
  74. 		                    break;
  75. 		                }
  76. 		            }
  77. 		            if((A[0]>=10.1)&&((int)(A[0]-5.1)+s0>=s))
  78. 		                System.out.println(ans+1);
  79. 		            else
  80. 		                System.out.println(-1);
  81. 		        }
  82. 		        else
  83. 		        	System.out.println(-1);
  84. 		    }   
  85. 		}	
  86. 	}
  87. }
Success #stdin #stdout 0.08s 2184192KB
comments (?)
stdin 
2 10.00 16.00
10.10 6.10
stdout 
2
https://ideone.com/c9cys4
language:
Java (HotSpot 12)
created:
6 years ago
visibility:
public

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