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LeetCode 2878: Get the Size of a DataFrame Solution

Master LeetCode problem 2878 (Get the Size of a DataFrame), 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.

2878. Get the Size of a DataFrame

Easy

Problem Explanation

Explanation:

To calculate the number of rows and columns in a DataFrame, we can simply count the number of rows and the number of columns in the given dataset. The number of rows can be determined by counting the number of entries in the dataset, and the number of columns can be determined by counting the number of unique attributes or columns in the dataset.

  • Algorithm:

    1. Count the number of rows by iterating through each row in the dataset.
    2. Count the number of columns by counting the number of unique attributes or columns in the dataset.
    3. Return the result as an array with the number of rows and number of columns.

  • Time Complexity: O(N) where N is the total number of entries in the dataset.

  • Space Complexity: O(1) since we are not using any extra space apart from the result array.

:

Solution Code

public int[] getSizeOfDataFrame(String[][] data) {
    if (data == null || data.length == 0) return new int[]{0, 0};

    int rows = data.length;
    int cols = data[0].length;

    return new int[]{rows, cols};
}

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What is the time complexity of LeetCode 2878 (Get the Size of a DataFrame)?

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