K5kC | Code & More
Computer Science
Algorithms
Programming Languages
Database
System Design
Problems
Blind 75
Difficulty: Easy
Difficulty: Medium
Difficulty: Hard
Videos
Projects
Android
Data Science
Computer Vision
Simulations
Tools
UUID Generator
Code Formatter
Search
⌘K
Count Unguarded Cells in the Grid
Copy title
Copy link
medium
Solve on LeetCode
Related Tags
binary-indexed-tree
binary-search
binary-tree
breadth-first-search
counting
depth-first-search
divide-and-conquer
dynamic-programming
enumeration
greedy
hash-function
hash-table
leetcode
math
matrix
merge-sort
number-theory
ordered-set
prefix-sum
rolling-hash
segment-tree
simulation
sliding-window
stack
string
tree
trie
Please enable JavaScript to view the
comments powered by Disqus.