FindTheHighestAltitude.cpp

// Source : https://leetcode.com/problems/find-the-highest-altitude/
// Author : Hao Chen
// Date   : 2021-02-17

/***************************************************************************************************** 
 *
 * There is a biker going on a road trip. The road trip consists of n + 1 points at different 
 * altitudes. The biker starts his trip on point 0 with altitude equal 0.
 * 
 * You are given an integer array gain of length n where gain[i] is the net gain in altitude between 
 * points i​​​​​​ and i + 1 for all (0 <= i < n). Return the highest altitude of a point.
 * 
 * Example 1:
 * 
 * Input: gain = [-5,1,5,0,-7]
 * Output: 1
 * Explanation: The altitudes are [0,-5,-4,1,1,-6]. The highest is 1.
 * 
 * Example 2:
 * 
 * Input: gain = [-4,-3,-2,-1,4,3,2]
 * Output: 0
 * Explanation: The altitudes are [0,-4,-7,-9,-10,-6,-3,-1]. The highest is 0.
 * 
 * Constraints:
 * 
 * 	n == gain.length
 * 	1 <= n <= 100
 * 	-100 <= gain[i] <= 100
 ******************************************************************************************************/

class Solution {
public:
    int largestAltitude(vector<int>& gain) {
        int result = 0;
        int sum = 0;
        for (auto& n : gain) {
            sum += n;
            result = max(result, sum);
        }
        return result;
    }
};