(Coderbyte) AB Check - Solução

Have the function ABCheck(str) take the str parameter being passed and return the string true if the characters a and b are separated by exactly 3 places anywhere in the string at least once (ie. "lane borrowed" would result in true because there is exactly three characters between a and b). Otherwise return the string false.

Solução:

import java.util.*;
import java.io.*;

class Function { 
  String ABCheck(String str) {
 
    for (int i = 0; i < str.length(); i++) {
      if (str.charAt(i) == 'a' || str.charAt(i) == 'b') {
          int count = 0;
          for(int j = i+1; j < str.length(); j++) {
            if (((str.charAt(j) == 'b' && str.charAt(i) == 'a') || (str.charAt(j) == 'a' && str.charAt(i) == 'b')) && count == 3) {
                return "true";
            }
            count++;
          }
      }
    }
   
    return "false";
   
  }
 
  public static void main (String[] args) { 
    // keep this function call here    
    Scanner  s = new Scanner(System.in);
    Function c = new Function();
    System.out.print(c.ABCheck(s.nextLine()));
  }  
 
}