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Author: chappdev2019

1149-intersection-of-three-sorted-arrays/1149-intersection-of-three-sorted-arrays.js

@@ -0,0 +1,21 @@
+/**
+ * @param {number[]} arr1
+ * @param {number[]} arr2
+ * @param {number[]} arr3
+ * @return {number[]}
+ */
+var arraysIntersection = function (arr1, arr2, arr3) {
+    let map = new Map();
+    const addToMap = (arr) => {
+        for (let i = 0; i < arr.length; i++)
+            map.set(arr[i], (map.get(arr[i]) || 0) + 1)
+    }
+    addToMap(arr1);
+    addToMap(arr2);
+    addToMap(arr3);
+    let res = [];
+    for (const [k, v] of map.entries()) {
+        if (v % 3 === 0) res.push(k);
+    }
+    return res;
+};