Merge branch 'main' into main

Author: Ykhan799

.problemSiteData.json

@@ -5855,7 +5855,7 @@
      "pattern":"Greedy",
      "link":"candy/",
      "video":"1IzCRCcK17A",
-     "difficulty":"Medium",
+     "difficulty":"Hard",
      "code":"135-candy"
   },
   {

README.md

@@ -0,0 +1,6 @@
+# Article Guide
+
+1. Each article should be written in markdown. Exanple: [duplicate-integer.md](https://github.com/neetcode-gh/leetcode/blob/main/articles/duplicate-integer.md)
+2. At least one solution should be similar to a solution present in the NeetCode video. Ideally all solutions from the video are present.
+3. Add time & space complexity
+4. Cover all relevant solutions if possible.