Fading Coder

After everyone else in the computer lab had many orange-rated handles, I finally achieved orange with my main account (apparently, I'm still quite weak). I'll write a blog post to record the experience. My counting skills are very poor. In the last 5 minutes of the contest, I hastily came up with a...

Problem A: Door Plaque Counting Objective: Determine the total count of the digit '2' required to generate serial numbers from 1 to 2020. Analysis: Iterate through every integer in the range [1, 2020]. For each number, extract individual digits or convert to a string representation to check if the c...