clueless coding // TODO: be smarter

LeetCode 11. Container With Most Water: C++ Solution



Problem Statement


Given n non-negative integers a1, a2, …, an, where each represents a point at coordinate (i, ai). n vertical lines are drawn such that the two endpoints of line i is at (i, ai) and (i, 0). Find two lines, which together with x-axis forms a container, such that the container contains the most water.

Function Signature (C++):
  int maxArea(vector<int>& height)



TL;DR Code Solution


int maxArea(vector<int>& height) {

    int left = 0;
    int right = height.size() - 1;

    int maxw = 0;
    int minh = 0;

    while (left < right) {

        minh = min(height[left], height[right]);
        maxw = max(maxw, minh * (right - left));

        while (left < right && height[left] <= minh) left++;
        while (left < right && height[right] <= minh) right--;
    }

    return maxw;

}