求最大面积

Container With Most Water

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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.

Note: You may not slant the container.

int maxArea(vector<int> &height) {
         // Start typing your C/C++ solution below
        // DO NOT write int main() function
        int i = 0;
        int j = height.size() - 1;

        int ret = 0;
        while(i < j)
        {
            int area = (j - i) * min(height[i], height[j]);
            ret = max(ret, area);

            if (height[i] <= height[j])
                i++;
            else
                j--;
        }

        return ret;
    }