LeetCode 2409: Count Days Spent Together Solution
Master LeetCode problem 2409 (Count Days Spent Together), 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.
Problem Explanation
Explanation:
To solve this problem, we can find the overlap between the ranges of dates that Alice and Bob are in Rome. We can do this by first determining the maximum of the arrival dates and the minimum of the leaving dates for Alice and Bob, and then finding the number of days in the overlap.
- Find the maximum of the arrival dates for Alice and Bob, and the minimum of the leaving dates for Alice and Bob.
- Calculate the number of days in the overlap by finding the difference between the minimum leaving date and the maximum arrival date, and adding 1 (inclusive).
Solution Code
class Solution {
public int countDays(String arriveAlice, String leaveAlice, String arriveBob, String leaveBob) {
int[] daysInMonth = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
String[] aliceArrive = arriveAlice.split("-");
String[] aliceLeave = leaveAlice.split("-");
String[] bobArrive = arriveBob.split("-");
String[] bobLeave = leaveBob.split("-");
int maxArrive = Math.max(Integer.parseInt(aliceArrive[0]) * 100 + Integer.parseInt(aliceArrive[1]), Integer.parseInt(bobArrive[0]) * 100 + Integer.parseInt(bobArrive[1]));
int minLeave = Math.min(Integer.parseInt(aliceLeave[0]) * 100 + Integer.parseInt(aliceLeave[1]), Integer.parseInt(bobLeave[0]) * 100 + Integer.parseInt(bobLeave[1]));
int overlapDays = Math.max(0, minLeave - maxArrive + 1);
return overlapDays;
}
}Try It Yourself
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