CTF Challenges by Category
All Skills
⭐
algorithms × 131
⭐
arrays × 87
⭐
linux × 72
⭐
data-structure × 72
💻
simulation × 70
💪
c-programming × 63
💻
optimization × 61
⭐
array × 56
⭐
sorting × 43
⭐
data-structures × 40
💪
python × 26
💪
pointers × 26
💪
control-flow × 25
💪
syntax × 24
💪
package-management × 23
⭐
php × 22
💻
greedy × 22
⭐
loops × 21
⭐
stack × 21
⭐
iteration × 21
💻
dynamic-programming × 20
💪
variables × 19
⭐
queue × 18
💻
sliding-window × 18
💪
php-programming × 17
💻
filtering × 17
💻
subarray × 16
💪
web-development × 15
💪
socket-programming × 15
⭐
programming × 15
💻
sequence × 15
⭐
traversal × 14
⭐
list × 14
💻
scheduling × 14
💪
operators × 13
⭐
lists × 13
⭐
sql × 13
💪
cli × 12
💪
mongodb × 12
💻
prefix-sum × 12
💻
graph × 12
💪
functions × 11
💪
database × 11
💪
data-types × 11
💻
merging × 11
💻
dfs × 11
💪
javascript × 10
💪
control-structures × 10
💪
debian × 10
⭐
basic × 10
⭐
strings × 10
💻
frequency × 10
💻
bst × 10
💪
memory × 9
💪
input-output-redirection × 9
💪
ubuntu × 9
⭐
basics × 9
⭐
query × 9
💻
data-processing × 9
💻
classes × 9
💻
hashing × 9
💻
union-find × 9
💪
c × 8
💪
semantics × 8
💪
system-monitoring × 8
⭐
scripting × 8
💻
array-manipulation × 8
💻
unique × 8
💪
control-flow-structures × 7
💪
crud × 7
💪
system-monitoring-tools × 7
💪
sql-programming × 7
💻
logic × 7
💻
two-pointer × 7
💻
math × 7
💻
inheritance × 7
💻
merge × 7
💻
dp × 7
🚩
web × 6
💪
continue-statement × 6
💪
update × 6
💪
process-management × 6
💪
linked-lists × 6
💪
database-management × 6
💪
variable-declaration × 6
💪
for-loop × 6
💪
java × 6
⭐
indexing × 6
⭐
stacks × 6
⭐
search × 6
💻
object-oriented-programming × 6
💻
resource-management × 6
💻
alternating × 6
💻
partitioning × 6
💻
subsequence × 6
💻
binary-tree × 6
💻
heap × 6
💻
interview-preparation × 6
💻
ordering × 6
💻
comparison × 6
💻
string-manipulation × 6
💪
conditional-statements × 5
💪
sql-syntax × 5
💪
binding × 5
💪
break-statement × 5
💪
arch-linux × 5
💪
conditionals × 5
💪
linked-list × 5
💪
file-management × 5
💪
tcp × 5
💪
c-language × 5
💪
comments × 5
💪
fedora × 5
💪
dpkg × 5
💪
switch-statement × 5
💪
computer-networks × 5
💪
memory-management × 5
💪
io-redirection × 5
💪
c++ × 5
💪
listening × 5
⭐
implementation × 5
⭐
hash-table × 5
💻
priority-queue × 5
💻
bfs × 5
💻
list-processing × 5
💻
code-optimization × 5
💻
compression × 5
💻
graphs × 5
💻
validation × 5
💻
calculation × 5
💻
oop × 5
💻
algorithm × 5
💻
rotation × 5
💻
primes × 5
💻
prime × 5
💻
intervals × 5
💻
object-oriented × 5
💪
apt × 4
💪
crud-operations × 4
💪
network-programming × 4
💪
switch-case × 4
💪
data-manipulation × 4
💪
output-redirection × 4
💪
data-retrieval × 4
💪
dereferencing × 4
💪
apt-get × 4
💪
decision-making × 4
💪
error-handling × 4
💪
output × 4
💪
session-management × 4
💪
complexity × 4
💪
time-complexity × 4
⭐
queues × 4
💻
brute-force × 4
💻
string-processing × 4
💻
deque × 4
💻
sum × 4
💻
binary-search × 4
💻
divisibility × 4
💻
combinatorics × 4
💻
greedy-algorithm × 4
💻
arithmetic × 4
💻
average × 4
💻
range-sum × 4
💻
reordering × 4
💻
list-manipulation × 4
💻
cycle-detection × 4
💻
temperature × 4
💻
counting × 4
💻
tree × 4
💻
design × 4
💻
hash-map × 4
💪
insert × 3
💪
sql-commands × 3
💪
while-loop × 3
💪
file-operations × 3
💪
null-pointer × 3
💪
file-commands × 3
💪
memory-usage × 3
💪
arraylist × 3
💪
delete-operation × 3
💪
branching × 3
💪
function × 3
💪
data-transmission × 3
💪
yum × 3
💪
switch × 3
💪
file-system × 3
💪
stdout × 3
💪
update-operation × 3
💪
data-insertion × 3
💪
http × 3
💪
network-topologies × 3
💪
stderr × 3
💪
if-else × 3
💪
html × 3
💪
pipes × 3
💪
constants × 3
💪
declaration × 3
💪
delete × 3
💻
dynamic × 3
💻
grouping × 3
💻
stability × 3
💻
traffic-light × 3
💻
queries × 3
💻
recursion × 3
💻
set × 3
💻
sequential × 3
💻
parity × 3
💻
cumulative × 3
💻
mathematics × 3
💻
order-preservation × 3
💻
hashmap × 3
💻
order × 3
💻
connectivity × 3
💻
linkedlist × 3
💻
bit-manipulation × 3
💻
two-pointers × 3
💻
pathfinding × 3
💪
bind × 2
💪
red-hat × 2
💪
sql-command × 2
💪
c-pointers × 2
💪
sql-basic × 2
💪
error-redirection × 2
💪
redhat × 2
💪
api × 2
💪
read-operation × 2
💪
debugging × 2
💪
disk-space × 2
💪
listen-function × 2
💪
performance × 2
💪
http-status-codes × 2
💪
use-case × 2
💪
for-loops × 2
💪
built-in-functions × 2
💪
directory-management × 2
💪
basic-syntax × 2
💪
arithmetic-operations × 2
💪
memory-address × 2
💪
keywords × 2
💪
if-statement × 2
💪
operating-systems × 2
💪
sql-queries × 2
💪
network-monitoring × 2
💪
input-redirection × 2
💪
css × 2
💪
methods × 2
💪
pointer-arithmetic × 2
💪
directory-commands × 2
💪
socket-function × 2
💪
slices × 2
💪
http-methods × 2
💪
append × 2
💪
processes × 2
💪
centos × 2
💪
api-design × 2
💪
bind-function × 2
💪
cyber-security × 2
💪
function-definition × 2
💪
data-extraction × 2
💪
basic-sql × 2
💪
differences × 2
💪
shell × 2
💪
system-calls × 2
💪
string-concatenation × 2
💪
file-redirection × 2
💪
update-command × 2
💪
c# × 2
💪
rest × 2
💪
assignment × 2
💪
socket × 2
💪
operations × 2
💪
go × 2
💪
programming-language × 2
💪
data-filter × 2
💪
disk-usage × 2
💪
navigation × 2
💪
directory-navigation × 2
💪
dynamic-memory × 2
💪
easy × 2
💪
json × 2
💪
basic-commands × 2
💪
php-syntax × 2
💪
space-complexity × 2
💪
where-clause × 2
💪
tools × 2
💪
composer × 2
💪
standard-error × 2
💪
networking × 2
💪
binary-heap × 2
💪
insert-operation × 2
💪
cybersecurity × 2
💪
concatenation × 2
💪
commands × 2
💪
table-modification × 2
💻
aggregation × 2
💻
stable-sort × 2
💻
palindrome × 2
💻
backtracking × 2
💻
min-stack × 2
💻
analysis × 2
💻
bruteforce × 2
💻
subarrays × 2
💻
level-order × 2
💻
circular-buffer × 2
💻
interleaving × 2
💻
filter × 2
💻
pair-sum × 2
💻
partition × 2
💻
strategy × 2
💻
efficiency × 2
💻
caching × 2
💻
interview × 2
💻
graph-connectivity × 2
💻
equilibrium × 2
💻
data-analysis × 2
💻
range-query × 2
💻
time-management × 2
💻
components × 2
💻
deduplication × 2
💻
graph-traversal × 2
💻
budgeting × 2
💻
graph-cycle × 2
💻
sums × 2
💻
accumulation × 2
💻
modular-arithmetic × 2
💻
inorder-traversal × 2
💻
sensor × 2
💻
grid × 2
💻
coin-change × 2
💻
queue-simulation × 2
💻
transactions × 2
💻
pricing × 2
💻
disjoint-set × 2
💻
cyclic × 2
💻
resource-allocation × 2
💻
verification × 2
💻
data-filtering × 2
💻
uniqueness × 2
💻
sequences × 2
💻
linear-probing × 2
💻
sensors × 2
💻
list-operations × 2
💻
movement × 2
💻
binary-search-tree × 2
💻
alternation × 2
💻
energy × 2
💻
tree-traversal × 2
💻
class-design × 2