Day84 :)

swolecoder · swolecoder · commit 21a5413490e1 · 2021-01-01T13:40:00.000-05:00
diff --git a/Day84/index.js b/Day84/index.js
@@ -0,0 +1,26 @@
+/**
+ * @param {number[]} arr
+ * @param {number[][]} pieces
+ * @return {boolean}
+ */
+var canFormArray = function (arr, pieces) {
+
+
+    let map = {};
+
+    for (let p of pieces) {
+        let data = p[0];
+        if (!(data in map)) map[data] = [];
+        map[data].push(...p)
+    }
+
+    let res = [];
+    for (let i = 0; i < arr.length; i++) {
+        if (arr[i] in map) {
+            res.push(...map[arr[i]])
+        }
+    }
+
+    console.log(res)
+    return arr.join("") == res.join("")
+};
diff --git a/README.md b/README.md
@@ -186,4 +186,6 @@ If you are loving solving problems in leetcode, please contact me to enjoy it to
 
 |Day 82| [289. Game of Life](https://leetcode.com/problems/game-of-life/) | [javascript]()|[:memo:](https://leetcode.com/problems/game-of-life/)|Medium|
 
-|Day 83| [84. Largest Rectangle in Histogram](https://leetcode.com/problems/largest-rectangle-in-histogram/) | [javascript]()|[:memo:](https://leetcode.com/problems/largest-rectangle-in-histogram/)|Medium|
+|Day 83| [84. Largest Rectangle in Histogram](https://leetcode.com/problems/largest-rectangle-in-histogram/) | [javascript]()|[:memo:](https://leetcode.com/problems/largest-rectangle-in-histogram/)|Medium|
+
+|Day 84| [1640. Check Array Formation Through Concatenation](https://leetcode.com/problems/check-array-formation-through-concatenation/) | [javascript]()|[:memo:](https://leetcode.com/problems/check-array-formation-through-concatenation/)|Easy|
