How the difficulty scale works

Our 1 to 14 scale, mapped to real ratings.

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Every problem on WhiteBox is mapped from a level from 1 to 14. It is most accurate in the algorithms roadmap. These ratings are direct mappings to sites like Codeforces, AtCoder & LeetCode. The conversion from CF to AtCoder is done with this site.

Label	Codeforces	AtCoder	LeetCode
1 Easy	800	< 200	Easy
2 Easy+	1000	200-400	Easy-Med
3 Normal	1200	400-650	Medium
4 Normal+	1400	650-900	Medium-Hard
5 Hard	1600	900-1200	Hard
6 Harder	1800	1200-1450	Hard+
7 Insane	2000	1450-1700	Hard++
8 Expert	2200	1700-1950	Hard++++
9 Master	2400	1950-2250	-
10 Grandmaster	2600	2250-2500	-
11 Glitched	2800	2500-2750	-
12 Mythic	3000+	2750+	-
13 Mythic+	3200+	3000+	-
14 Legendary	3500+	3200+	-

A practical bar is that most FAANG-style interviews go to at most level 5 or 6. If you're able to solve those problems from scratch within a reasonable amount of time, you shouldn't have to worry about LeetCode for a while. Levels above that are for fun or if you are going into roles that require stronger problem solving ability, like quant.