LeetCode-in-Java

3280. Convert Date to Binary

Easy

You are given a string date representing a Gregorian calendar date in the yyyy-mm-dd format.

date can be written in its binary representation obtained by converting year, month, and day to their binary representations without any leading zeroes and writing them down in year-month-day format.

Return the binary representation of date.

Example 1:

Input: date = “2080-02-29”

Output: “100000100000-10-11101”

Explanation:

100000100000, 10, and 11101 are the binary representations of 2080, 02, and 29 respectively.

Example 2:

Input: date = “1900-01-01”

Output: “11101101100-1-1”

Explanation:

11101101100, 1, and 1 are the binary representations of 1900, 1, and 1 respectively.

Constraints:

• date.length == 10
• date[4] == date[7] == '-', and all other date[i]’s are digits.
• The input is generated such that date represents a valid Gregorian calendar date between Jan 1^st, 1900 and Dec 31^st, 2100 (both inclusive).

Solution

public class Solution {
    private String helper(String str) {
        return Integer.toBinaryString(Integer.parseInt(str));
    }

    public String convertDateToBinary(String date) {
        StringBuilder sb = new StringBuilder();
        for (String str : date.split("-")) {
            sb.append(helper(str));
            sb.append("-");
        }
        sb.deleteCharAt(sb.length() - 1);
        return sb.toString();
    }
}

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