README.md

HackerRank Solutions

A collection of HackerRank problem solutions organized by programming language.

Structure

HackerRank/
├── cpp/           # C++ solutions (14)
├── python/        # Python solutions (6)
└── README.md

C++ Solutions

File	Problem	Category
absolute_element_sums.cpp	Absolute Element Sums	Arrays
bike_racers.cpp	Bike Racers	Graph / Matching
count_luck.cpp	Count Luck	Graph / DFS
cut_the_tree.cpp	Cut the Tree	Trees / DFS
gena_playing_hanoi.cpp	Gena Playing Hanoi	DP / BFS
gridland_metro.cpp	Gridland Metro	Intervals
hackerland_radio_transmitters.cpp	Hackerland Radio Transmitters	Greedy
making_candies.cpp	Making Candies	Greedy / Binary Search
matrix_land.cpp	Matrix Land	DP
maximizing_mission_points.cpp	Maximizing Mission Points	DP / Geometry
problem_solving.cpp	Problem Solving	DP
similar_pair.cpp	Similar Pair	Trees / BIT
task_scheduling.cpp	Task Scheduling	Greedy
the_longest_increasing_subsequence.cpp	The Longest Increasing Subsequence	DP

Python Solutions

File	Problem	Category
how_many_substrings.py	How Many Substrings?	Strings / Suffix Array
matrix_script.py	Matrix Script	Regex
morgan_and_a_string.py	Morgan and a String	Strings / Greedy
save_humanity.py	Save Humanity	Strings / Z-Algorithm
similar_strings.py	Similar Strings	Strings / Z-Algorithm
validating_postal_codes.py	Validating Postal Codes	Regex

Usage

C++:

cd cpp
g++ -o solution bike_racers.cpp
./solution < input.txt

Python:

cd python
python3 morgan_and_a_string.py < input.txt