LeetCode 2879: Display the First Three Rows Solution

Master LeetCode problem 2879 (Display the First Three Rows), a easy challenge, with our optimized solutions in Java, C++, and Python. Explore detailed explanations, test your code in our interactive editor, and prepare for coding interviews.

2879. Display the First Three Rows

Easy

Problem Explanation

Explanation:

To display the first three rows of the DataFrame, we can simply iterate over the DataFrame and print the first three rows.

Algorithm:
1. Initialize a variable to keep track of the current row count.
2. Iterate over the DataFrame and print each row until the row count reaches 3.
Time Complexity: O(n) where n is the number of rows in the DataFrame.
Space Complexity: O(1)

Solution Code

import java.util.List;

public class DisplayFirstThreeRows {
    public void displayFirstThreeRows(List<List<Object>> dataFrame) {
        int rowCount = 0;
        for (List<Object> row : dataFrame) {
            if (rowCount >= 3) {
                break;
            }
            System.out.println(row);
            rowCount++;
        }
    }
}

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