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Repeated String Hackerrank Solution - java

 Repeated String Hackerrank Solution - java 

For Explanation Watch Video :




Code : 

import java.io.*;
import java.math.*;
import java.security.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.function.*;
import java.util.regex.*;
import java.util.stream.*;
import static java.util.stream.Collectors.joining;
import static java.util.stream.Collectors.toList;

class Result {

    public static int noOfA(String s,long rem){
        int count = 0;
        for(int i=0;i<rem;i++){
            if(s.charAt(i)=='a'){
                count++;
            }
        }
        return count;
    }
    public static long repeatedString(String s, long n) {
        int a_count = 0;
        for(int i=0;i<s.length();i++){
            if(s.charAt(i)=='a'){
                a_count++;
            }
        }
        long rem = n % s.length();
        if(rem==0){
            return (n/s.length()) * a_count;
        }
        int count = noOfA(s,rem);
        return (n/s.length()) * a_count + count;
        
    }

}

public class Solution {
    public static void main(String[] args) throws IOException {
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));

        String s = bufferedReader.readLine();

        long n = Long.parseLong(bufferedReader.readLine().trim());

        long result = Result.repeatedString(s, n);

        bufferedWriter.write(String.valueOf(result));
        bufferedWriter.newLine();

        bufferedReader.close();
        bufferedWriter.close();
    }
}


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