Update 1371-find-the-longest-substring-containing-vowels-in-even-counts.js

Author: everthis

1371-find-the-longest-substring-containing-vowels-in-even-counts.js

@@ -1,3 +1,28 @@
+/**
+ * @param {string} s
+ * @return {number}
+ */
+const findTheLongestSubstring = function(s) {
+  const n = s.length
+  const ch2num = ch => {
+    const idx = 'aeiou'.indexOf(ch)
+    return idx === -1 ? 0 : (1 << idx)
+  }
+  let res = 0
+  let mask = 0
+  const hash = new Map([[0, -1]])
+  for (let i = 0; i < n; i++) {
+    mask ^= ch2num(s[i])
+    const first = hash.has(mask) ? hash.get(mask) : i
+    if (!hash.has(mask)) hash.set(mask, i)
+    res = Math.max(res, i - first)
+  }
+
+  return res
+};
+
+// another
+
 /**
  * @param {string} s
  * @return {number}