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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		// your code goes here
  13. 		String s = "LCCT";
  14. 		System.out.println("LCT count after one insertion is "+ lctCount(s));
  15. 	}
  16. 	static int lctCount(String s){
  17. 		int n = s.length();
  18. 		long[] prefixL = new long[n];
  19. 		long[]prefixLC = new long[n];
  20. 		long l = 0, lc = 0, lctCount = 0;
  21. 		for(int i=0;i<n;i++){
  22. 			char c = s.charAt(i);
  23. 			if(c == 'L'){
  24. 				l++;
  25. 			}
  26. 			if(c == 'C'){
  27. 				lc+=l;
  28. 			}
  29. 			if(c == 'T'){
  30. 				lctCount += lc;
  31. 			}
  32. 			prefixL[i] = l;
  33. 			prefixLC[i] = lc;
  34. 		}
  35. 		long[]sufixT = new long[n];
  36. 		long[]sufixTC = new long[n];
  37. 		long t = 0,tc = 0;
  38. 		for(int i=n-1;i>=0;i--){
  39. 			char c = s.charAt(i);
  40. 			if( c == 'T'){
  41.  
  42. 				t++;
  43. 			}
  44. 			if( c == 'C'){
  45. 				tc+=t;
  46. 			}
  47. 			sufixT[i] = t;
  48. 			sufixTC[i] = tc;
  49. 		}
  50. 		long answer1 = lctCount+sufixTC[0];
  51. 		long answer2 = lctCount+prefixLC[n-1];
  52. 		long answer3 = 0;
  53. 		for(int i=0;i<n-1;i++){
  54. 			answer3 = Math.max(answer3, prefixLC[i]*sufixT[i+1]);
  55. 		}
  56. 		answer3 = Math.max(answer3,Math.max(answer1,answer2));
  57. 		return (int)answer3;
  58. 	}
  59. }
Success #stdin #stdout 0.1s 55488KB
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Standard input is empty
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LCT count after one insertion is 4
https://ideone.com/s7yqMY
language:
Java (HotSpot 12)
created:
1 day ago
visibility:
public

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