CODEWITHSUNDEEP
javaarraysbinary-search
pavan kumar
pavan kumar

Reputation: 3

Working Sturcture of Arrays. binarySearch() method in java

I'm trying solve problem in Strings,finding matching characters in to String. I solve it using Character Array and inner loop but i think it has more time complexity. so try to solve it in Arrays binary search but it gives inappropriate result.i want working structure of binary search method in java.

I set matched value in the String two to duplicate char '#',because don't want to match another char.

public static void main(String[] args) {

        Scanner s= new Scanner(System.in);


        String team1 = s.next();
        String team2 = s.next();

        char[] teamA = team1.toCharArray();
        char[] teamB = team2.toCharArray();

        Arrays.sort(teamB);

        int count = 0;
        for(int a=0;a< teamA.length;a++) {
            int index = Arrays.binarySearch(teamB, teamA[a]);

            if(index >= 0) {
                count++;
                teamB[index] = '#';
            }
        }
        System.out.println(count);
    }

if i give input of two strings "aabc" and "zbaa" expected output is 3 but my program gives output 2.

Upvotes: 0

Views: 32

Answers (1)

Prashant
Prashant

Reputation: 153

The problem is that once you update the teamB array in the loop the array is no longer sorted. And in unsorted array binary search will give unexpected outputs.

Upvotes: 0

Related Questions