Create 1817-finding-the-users-active-minutes.js

Author: everthis

1817-finding-the-users-active-minutes.js

@@ -0,0 +1,24 @@
+/**
+ * @param {number[][]} logs
+ * @param {number} k
+ * @return {number[]}
+ */
+const findingUsersActiveMinutes = function(logs, k) {
+  const hash = {}, map = {}
+  logs.forEach(l => {
+    const [id, mi] = l
+    if(hash[mi] == null) hash[mi] = new Set()
+    if(map[id] == null) map[id] = new Set()
+    hash[mi].add(id)
+    map[id].add(mi)
+  })
+
+  const res = Array(k).fill(0)
+  Object.keys(map).forEach(k => {
+     const num = map[k].size
+     res[num - 1]++
+  })
+  
+  return res
+  
+};