Zeusco2021
diff --git a/‎.idea/workspace.xml‎
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diff --git a/‎README.md‎
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@@ -414,3 +414,4 @@ codes may not be optimized
 ### Day 20 - Hard
 
 1. [LRU Cache](https://leetcode.com/problems/lru-cache/description/)
+1. [LFU Cache](https://leetcode.com/problems/lfu-cache/description/)
Original file line number	Diff line number	Diff line change
`@@ -414,3 +414,4 @@ codes may not be optimized`
`414`	`414`	`### Day 20 - Hard`
`415`	`415`
`416`	`416`	`1. [LRU Cache](https://leetcode.com/problems/lru-cache/description/)`
	`417`	`+1. [LFU Cache](https://leetcode.com/problems/lfu-cache/description/)`