Bug Report for valid-sudoku

[pavan1603]

Bug Report for https://neetcode.io/problems/valid-sudoku

Please describe the bug below and include any steps to reproduce the bug or screenshots if possible.
an error is rising for import even though there is no error here is my code:

import java.util.*;

class Solution {
public boolean isValidSudoku(char[][] board) {
Set[] rows = new HashSet[9];
Set[] cols = new HashSet[9];
Set[] boxes = new HashSet[9];

    for (int i = 0; i < 9; i++) {
        rows[i] = new HashSet<>();
        cols[i] = new HashSet<>();
        boxes[i] = new HashSet<>();
    }

    for (int i = 0; i < 9; i++) {
        for (int j = 0; j < 9; j++) {
            char num = board[i][j];
            if (num == '.') continue;

            int boxIndex = (i / 3) * 3 + (j / 3);
            if (!rows[i].add(num) || !cols[j].add(num) || !boxes[boxIndex].add(num)) {
                return false;
            }
        }
    }

    return true;
}

}

[zkamenov]

@pavan1603 It seems that you are importing packages in Java for a LeetCode problem. These imports are implied for Java, so the code should still compile fine without any import statement, given that the code is otherwise written correctly. I encountered this compiler behavior early on, so all you need to do is remove the import statement.