💾 Dynamic Programming
The "Memoization" Chapter
Remember when you calculated 1+1 and wrote it down so you didn't have to calculate it again for 1+1+1? That's DP! Save answers so you don't recalculate!
Easy
→
Climbing Stairs
How many ways to climb n stairs?
Medium
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House Robber
Max money without triggering alarm!
Medium
→
Longest Increasing Subsequence
Longest growing chain in array!
Medium
→
Coin Change
Minimum coins for amount!
🎯 Brain Hack
DP Patterns: 1) Memoization (top-down) - save results as you go 2) Tabulation (bottom-up) - build table from small to big 3) DP[i] depends on DP[i-1] or DP[i-2]!