Latina

Electronics Shop

2 pointers  sorting 

Find the Missing Value

manifold  frequency-table  math 

Hotel Coverage

sort  ad hoc  greedy 

Jesse and Cookies

priority queue 

Mark and Toys

sort 

Minimum Loss

binary search  patterns  sort 

Pairs

sorting  hashtable  binary-search 

Sherlock and Array

prefix sum  manifold  2 pointers