415

Author: lazzzis

415/main.js

@@ -0,0 +1,21 @@
+/**
+ * @param {string} num1
+ * @param {string} num2
+ * @return {string}
+ */
+var addStrings = function(num1, num2) {
+  const ans = []
+  let remainder = 0
+  let i = num1.length - 1
+  let j = num2.length - 1
+  while (remainder || i >= 0 || j >= 0) {
+    let sum = (num1[i] == null ? 0 : +num1[i]) + (num2[j] == null ? 0 : +num2[j]) + remainder
+    ans.push(sum % 10)
+    remainder = Math.floor(sum / 10)
+    j--
+    i--
+  }
+  return ans.reverse().join('')
+};
+
+console.log(addStrings('0', '0'))

README.md

@@ -135,6 +135,7 @@
 - [398 Random Pick Index](./398)
 - [347 Top K Frequent Elements](./347)
 - [414 Third Maximum Number](./414)
+- [415 Add Strings](./415)
 - [442 Find All Duplicates in an Array](./442)
 - [448 Find All Numbers Disappeared in an Array](./448)
 - [495 Teemo Attacking](./495)