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Chapter 01 · Get started
First program
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12/147 required exercises
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CHALLENGE ACHIEVEMENTS
2/16 passed01Completed
Foundations 1
Best100%
02Completed
Strings & Bits
Best50%
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
11Retry
Network Systems
Best0%
12
Grids & Simulation
13
Pointers & Memory
14
C Language Core
15
Data Structures
16
Sort & Search
EXERCISE MASTERY
17/210Every exercise you've started, completed, refined and mastered.
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ACTIVITY
Recent exercise and challenge runs.
putchar
Retry · 1 attempt
Aug 28
Strings & Bits
Passed · 4/8 levels · 180 min
Aug 27
Foundations 1
Passed · 8/8 levels · 112 min
Aug 27
Foundations 1
Passed · 6/8 levels · 180 min
Aug 27
Member since 2 monthsActive Aug 28