// a personal leetcode journal
Save the one thing that made a LeetCode problem click. Your notes stay on your device, ready whenever you need to remember why the solution worked.
Expand right until the window is valid, then shrink from left while it stays valid. Track how many required characters are still missing instead of recounting the map every step.
Duplicates in t count. Record the answer before shrinking, not after.
Finish the problem on LeetCode.
Save what made it click, what tripped you up, and what you want to remember.
Come back later. Try to reconstruct the approach before revealing your notes.
You solved it.
Write down why.
CodeCards saves your insight, mistakes, and gotchas instead of generating another explanation for you. Your notes are worth keeping because you wrote them.
*/Expand right until the window is valid, then shrink from left while it stays valid. Track how many required characters are still missing instead of recounting the map every step.
Duplicates in t count. Record the answer before shrinking, not after.
Start building your personal coding interview notebook.
open CodeCards