Create 5978-count-words-obtained-after-adding-a-letter.js

Author: everthis

5978-count-words-obtained-after-adding-a-letter.js

@@ -0,0 +1,28 @@
+/**
+ * @param {string[]} startWords
+ * @param {string[]} targetWords
+ * @return {number}
+ */
+var wordCount = function(startWords, targetWords) {
+        const set = new Set();
+    for (let startWord of startWords) {
+        const chars = startWord.split('');
+        chars.sort();
+        set.add(chars.join(''));
+    }
+    let res = 0;
+    for (let targetWord of targetWords) {
+        let chars = targetWord.split('');
+        chars.sort()  
+
+        let word = chars.join('');
+        for (let i = 0; i < chars.length; i++) {
+            let subWord = word.substring(0, i) + word.substring(i + 1, chars.length);
+            if (set.has(subWord)) {
+                res++;
+                break;
+            }
+        }
+    }
+    return res;
+};