Merge pull request #1508 from Hitesh4278/design-front-middle-back-queue

Added Solution  of Design front middle back queue Issue No - 1441

Author: ajay-dhangar

dsa-problems/leetcode-problems/1600-1699.md

@@ -434,7 +434,7 @@ export const problems = [
         "problemName": "1670. Design Front Middle Back Queue",
         "difficulty": "Medium",
         "leetCodeLink": "https://leetcode.com/problems/design-front-middle-back-queue",
-        "solutionLink": "#"
+        "solutionLink": "/dsa-solutions/lc-solutions/1600-1699/design-front-middle-back-queue"
     },
     {
         "problemName": "1671. Minimum Number of Removals to Make Mountain Array",