Create 2423-remove-letter-to-equalize-frequency.js

Author: everthis

2423-remove-letter-to-equalize-frequency.js

@@ -0,0 +1,23 @@
+/**
+ * @param {string} word
+ * @return {boolean}
+ */
+const equalFrequency = function (word) {
+  const cnt = {}
+  for(const ch of word) {
+    if(cnt[ch] == null) cnt[ch] = 0
+    cnt[ch]++
+  }
+
+  for(const ch of word) {
+    cnt[ch]--
+    if(cnt[ch] === 0) delete cnt[ch]
+    const s = new Set([...Object.values(cnt)])
+    if(s.size === 1) return true
+
+    if(cnt[ch] == null) cnt[ch] = 0
+    cnt[ch]++ 
+  }
+
+  return false
+}