import java.io.; import java.math.; import java.security.; import java.text.; import java.util.; import java.util.concurrent.; import java.util.regex.*;

public class Solution {

// Complete the arrayManipulation function below.
static long arrayManipulation(int n, int[][] queries) {
  int[] arr = new int[n];
  for(int i=0;i<n;i++){
    arr[i] = 0;
  }
  int m = queries.length;
  for(int i=0;i<m;i++){
    for(int j=queries[i][0]-1;j<queries[i][1];j++){
      arr[j] += queries[i][2];
    }
  }
  int max = arr[0];
  for(int i=1;i<n;i++){
    if(arr[i]>max){
      max = arr[i];
    }
  }
  return(max);








}

private static final Scanner scanner = new Scanner(System.in);

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

    String[] nm = scanner.nextLine().split(" ");

    int n = Integer.parseInt(nm[0]);

    int m = Integer.parseInt(nm[1]);

    int[][] queries = new int[m][3];

    for (int i = 0; i < m; i++) {
        String[] queriesRowItems = scanner.nextLine().split(" ");
        scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");

        for (int j = 0; j < 3; j++) {
            int queriesItem = Integer.parseInt(queriesRowItems[j]);
            queries[i][j] = queriesItem;
        }
    }

    long result = arrayManipulation(n, queries);

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

    bufferedWriter.close();

    scanner.close();
}

}

What is wrong with this code. Please help.