NL
nlk
Chapter 01 · Get started
First program
64/3592 XP0/7 checkpoints validated
5/147 required exercises
View pathTECHNICAL SKILLS
CHALLENGE ACHIEVEMENTS
0/16 passed01
Foundations 1
02
Strings & Bits
03
Lists, Math & Bases
04
Algorithms & Parsers
05
Strings from Scratch
06
Memory & Pointers
07
Rebuild the C Standard Library
08
Mastery
09
Algorithms & Parsing
10
Systems & Processes
11
Network Systems
12
Grids & Simulation
13
Pointers & Memory
14
C Language Core
15
Data Structures
16
Sort & Search
EXERCISE MASTERY
7/210Every exercise you've started, completed, refined and mastered.
Not started
In progress
Completed
Mastered
STREAK
0daysExercises, challenges and checkpoints you cleared, day by day over the last 22 weeks.
Best streak
2d
This week
0
Active days
2
ACTIVITY
Recent exercise and challenge runs.
find_last_e
Passed · 10 attempts
Aug 28
arg_count
Passed · 13 attempts
Aug 28
putchar
Retry · 11 attempts
Aug 28
bare_char
Passed · 1 attempt
Aug 27
static_byte
Passed · 2 attempts
Aug 27
print_digits
Passed · 4 attempts
Aug 27
countdown
Passed · 3 attempts
Aug 27
hello
Passed · 4 attempts
Aug 27
Member since 2 monthsActive Aug 28