XE
xeno
Chapter 01 · Get started
First program
580/3592 XP0/7 checkpoints validated
25/147 required exercises
View pathTECHNICAL SKILLS
CHALLENGE ACHIEVEMENTS
1/16 passed01Completed
Foundations 1
Best100%
02Retry
Strings & Bits
Best25%
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
36/210·1Every 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
3
Active days
13
ACTIVITY
Recent exercise and challenge runs.
putchar
Passed · 4 attempts
2d ago
list_node_count
Passed · 6 attempts
5d ago
strdup
Passed · 9 attempts
21d ago
calloc
Passed · 25 attempts
21d ago
atoi
Passed · 3 attempts
22d ago
memcmp
Passed · 77 attempts
9d ago
strchr
Passed · 1 attempt
22d ago
memchr
Passed · 44 attempts
6d ago
memmove
Passed · 10 attempts
6d ago
memcpy
Passed · 4 attempts
28d ago
Member since 1 monthActive 2d ago