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42 Tirana· Tirana
Chapter 01 · Get started
Conditions and loops
832/3592 XP1/7 checkpoints validated
49/147 required exercises
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CHALLENGE ACHIEVEMENTS
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Foundations 1
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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
65/210·2Every exercise you've started, completed, refined and mastered.
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ACTIVITY
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add_prime_sum
Passed · 9 attempts
Sep 30
is_subsequence
Passed · 3 attempts
Sep 30
C foundations checkpoint
Passed · 5/5 levels · 22 min
Sep 21
checked_size
Passed · 1 attempt
Sep 21
same_character_bag
Retry · 3 attempts
Sep 30
shift_alpha
Passed · 5 attempts
Sep 10
rot_13
Passed · 7 attempts
Sep 10
reverse_int
Passed · 8 attempts
Sep 10
split
Passed · 15 attempts
Sep 10
Foundations 1
Passed · 8/8 levels · 28 min
Sep 9
Member since 2 monthsActive Sep 30