[HAI] week3 max area

https://leetcode.com/problems/container-with-most-water/description/?source=submission-ac

lib/maxArea/maxArea.ts

@@ -0,0 +1,15 @@
+ export function maxArea(height: number[]): number {
+  let L = 0;
+  let R = height.length - 1;
+  let res = 0;
+
+  while (L <= R) {
+    let hL = height[L];
+    let hR = height[R];
+    let currArea = Math.min(hL, hR) * (R - L);
+    if (currArea > res) res = currArea;
+    hR > hL ? L++ : R--;
+  }
+
+  return res;
+};