https://leetcode.cn/problems/buddy-strings

Author: masx200

README.md

@@ -45,6 +45,8 @@ Step 2. Add the dependency
 
 <summary>展开查看</summary>
 
+https://leetcode.cn/problems/buddy-strings
+
 https://leetcode.cn/problems/maximum-frequency-stack
 
 https://leetcode.cn/problems/calculate-amount-paid-in-taxes

buddy-strings/index.ts

@@ -0,0 +1,21 @@
+function buddyStrings(A: string, B: string): boolean {
+    if (A.length !== B.length || A.length + B.length <= 2) return false;
+    if (A === B) {
+        return A.length > new Set(A).size;
+    }
+    const indexArr: number[] = [];
+    for (let index = 0; index < A.length; index++) {
+        if (A[index] !== B[index]) {
+            indexArr.push(index);
+        }
+    }
+    if (
+        indexArr.length === 2 &&
+        A[indexArr[0]] === B[indexArr[1]] &&
+        B[indexArr[0]] === A[indexArr[1]]
+    ) {
+        return true;
+    }
+    return false;
+}
+export default buddyStrings;