LeetCode 2837: Total Traveled Distance Solution

Master LeetCode problem 2837 (Total Traveled Distance), 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.

2837. Total Traveled Distance

Easy

Database

Problem Explanation

Explanation:

To solve this problem, we need to calculate the total distance traveled by a car given its speed and a series of timestamps. We can calculate the distance traveled at each time interval and sum them up to get the total traveled distance.

Initialize variables totalDistance and prevTime to 0 and null respectively.
Iterate through the timestamps and for each timestamp:
- If prevTime is not null, calculate the time interval timeInterval as the difference between the current timestamp and prevTime.
- Calculate the distance traveled in this time interval by multiplying the speed and time interval.
- Update totalDistance by adding the distance traveled in the current time interval.
- Update prevTime to the current timestamp.
Return the totalDistance as the final result.

Time Complexity:

The time complexity of this algorithm is O(n) where n is the number of timestamps.

Space Complexity:

The space complexity of this algorithm is O(1) as we are using a constant amount of extra space.

: :

Solution Code

class Solution {
    public double totalTraveledDistance(int[] timestamps, int[] speed) {
        double totalDistance = 0;
        Integer prevTime = null;
        
        for (int i = 0; i < timestamps.length; i++) {
            if (prevTime != null) {
                int timeInterval = timestamps[i] - prevTime;
                double distance = speed[i] * timeInterval;
                totalDistance += distance;
            }
            prevTime = timestamps[i];
        }
        
        return totalDistance;
    }
}

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