Run error for the 2nd test case. rest cases have passed

#1

import java.util.;
import java.io.;
public class Main {
public static void main(String args[]) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
int n = Integer.parseInt(br.readLine());
String s1[] = br.readLine().trim().split("\s+");
String s2[] = br.readLine().trim().split("\s+");

    HashMap<String, Integer> map = new HashMap<>();
    ArrayList<String> list = new ArrayList<>();

    for(int i = 0; i < n; i++) {
        if(map.containsKey(s1[i])) {
            map.put(s1[i], map.get(s1[i]) + 1);
        } else {
            map.put(s1[i], 1);
        }
    }

    for(int i = 0; i < n; i++) {
        if(map.containsKey(s2[i])) {
            if(map.get(s2[i]) > 0) {
                list.add(s2[i]);
                map.put(s2[i], map.get(s2[i]) - 1);
            }
        }
    }

    Collections.sort(list);
    System.out.print(list);
}

}

#2

Your logic is correct, there is some problem with the input format. Actually when you are taking input using buffered reader, spaces matter a lot. So, in the second test case there is a space after the value of n is given. That is causing your input mismatch problems.

For example: 7
1 2 3 1 2 4 1
2 1 3 1 5 2 2

In this sample test case, if I put a space after 7, it will cause a problem because it is taking input as a string, so it is not able to convert "7 " to int. You can either try to find a way around this by using split function, or simply use scanner class.

#3

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