Create 1224-maximum-equal-frequency.js

Author: everthis

1224-maximum-equal-frequency.js

@@ -0,0 +1,26 @@
+/**
+ * @param {number[]} nums
+ * @return {number}
+ */
+const maxEqualFreq = function (nums) {
+  const cnt = {},
+    freq = {}
+  let maxF = 0,
+    res = 0
+  nums.forEach((num, i) => {
+    if (cnt[num] == null) cnt[num] = 0
+    cnt[num] += 1
+    if (freq[cnt[num] - 1] == null) freq[cnt[num] - 1] = 0
+    if (freq[cnt[num]] == null) freq[cnt[num]] = 0
+    freq[cnt[num] - 1] -= 1
+    freq[cnt[num]] += 1
+    maxF = Math.max(maxF, cnt[num])
+    if (
+      maxF * freq[maxF] === i ||
+      (maxF - 1) * (freq[maxF - 1] + 1) === i ||
+      maxF === 1
+    )
+      res = i + 1
+  })
+  return res
+}