Turin

Angry Professor

patterns 

Balanced Brackets

stack 

Beautiful Binary String

strings 

Beautiful Triplets

binary search  frequency table  manifold 

Cavity Map

ad hoc 

Circular Array Rotation

math 

Climbing the Leaderboard

binary search  sorted sequence 

Counting Valleys

patterns 

Electronics Shop

2 pointers  sorting 

Equal Stacks

prefix sum 

Evaluate Expression

design  stack 

Fair Rations

math  ad hoc 

Find Kth Zero

binary search 

Find the Missing Value

manifold  frequency-table  math 

Fixed Adjacent Values

ad hoc 

Game of Thrones

frequency table 

Gemstones

hashtable  frequency table 

Greedy Florist

Impress the Interviewer

binary search  constrained 

Jesse and Cookies

priority queue 

Mark and Toys

sort 

Mars Exploration

patterns 

Max Min

patterns  sort  functional 

Minimum Distances

hashtable 

Minimum Loss

binary search  patterns  sort 

One Swap

patterns  ad-hoc 

Pairs

sorting  hashtable  binary-search 

Picking Numbers

sort  frequency table  prefix sum 

Queue Using Two Stacks

constrained  stack 

Sherlock and Array

prefix sum  manifold  2 pointers 

Simple Text Editor

stack 

String Construction

sort  frequency-table 

Strong Password

manifold  bitset  design 

Student Sections

binary search  prefix sum  manifold 

The Absent Students

sort  manifold 

The Lucky Employee

frequency table  prefix sum  hashtable 

Weighted Uniform String

sort  binary search