A few years ago I solved 200 LeetCode problems and still froze on Mediums I hadn't seen. The breakthrough wasn't another hundred problems. It was a different loop. A problem asks for the longest substring with at most K distinct characters. You've solved sliding window before. Maximum sum subarray of size K, done. Longest substring without repeating characters, done. This third one stalls you. Twe
There's about $400 of meat, milk, and miscellaneous condiments in my kitchen fridge at any given time. It runs 24/7, makes a quiet humming noise, and gives no indication when something's wrong until you open the door three days later and recoil. The freezer compartment is worse: a slow failure can defrost everything before you notice the puddle. I already had a TP-Link P110 smart plug on the fridg