Update README.md

zenglekidd · web-flow · commit fd849f926555 · 2020-10-20T02:00:58.000+08:00
diff --git a/README.md b/README.md
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 Stage 3 (Leetcode# <= 200)
 - [x] [Top 100 Liked Problems - LeetCode](https://leetcode.com/problemset/top-100-liked-questions/) (Start: 43 / 100 Solved, Current: 100 / 100 Solved, Progress: 57 / 57)
-- [ ] [Backtracking - LeetCode](https://leetcode.com/tag/backtracking/) (Start: 6 / 21 Solved, Current: 11 / 21 Solved, Progress: 5 / 15)
+- [ ] [Backtracking - LeetCode](https://leetcode.com/tag/backtracking/) (Start: 6 / 21 Solved, Current: 13 / 21 Solved, Progress: 7 / 15)
 - [x] [Sliding Window - LeetCode](https://leetcode.com/tag/sliding-window/) (Start: 2 / 2 Solved, Current: 2 / 2 Solved)
 - [ ] [Dynamic Programming - LeetCode](https://leetcode.com/tag/dynamic-programming/) (Start: 11 / 27 Solved, Current: 15 / 27 Solved, Progress: 4 / 16)
 - [x] [Divide and Conquer - LeetCode](https://leetcode.com/tag/divide-and-conquer/) (Start: 4 / 4 Solved, Current: 4 / 4 Solved)
