LeetCode 1118: Number of Days in a Month Solution
Master LeetCode problem 1118 (Number of Days in a Month), 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.
1118. Number of Days in a Month
Problem Explanation
Explanation
To solve this problem, we need to determine the number of days in a given month and year. We can achieve this by considering leap years and non-leap years. For non-leap years, each month has a fixed number of days. For leap years, we need to consider the special case of February having 29 days.
The algorithm involves the following steps:
- Check if the given year is a leap year.
- Based on the month index, return the number of days in that month accounting for leap years.
Time complexity: O(1) Space complexity: O(1)
Solution Code
class Solution {
public int numberOfDays(int Y, int M) {
int[] daysInMonth = new int[]{0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
if (M == 2 && (Y % 4 == 0 && Y % 100 != 0 || Y % 400 == 0)) {
return 29;
}
return daysInMonth[M];
}
}Try It Yourself
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