STL-Problems

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Welcome to the STL Problem Practice Repository! Explore a curated topic specific collection of problems to help you master the Standard Template Library (STL) in C++. Start practicing now to elevate your proficiency in C++'s powerful STL!

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# Overview
Welcome to the STL Problem Practice Repository! Explore a curated topic-specific collection of problems to help you master the Standard Template Library (STL) in C++. Start practicing now to elevate your proficiency in C++'s powerful STL!

## Vector
  - [Vector-Erase](https://www.hackerrank.com/challenges/vector-erase/problem)
  - [Vector-Sort](https://www.hackerrank.com/challenges/vector-sort/problem)
  - [Search Insert Delete](https://www.spoj.com/problems/SID/) - `Vector + Sort`
  - [Second-Price Auction](https://codeforces.com/contest/386/problem/A) - `Vector + Pair`

## Set
  - [Sets-STL](https://www.hackerrank.com/challenges/cpp-sets/problem)
  - [QHEAP1](https://www.hackerrank.com/challenges/qheap1/problem?isFullScreen=true) - `Set or Multiset`
  - [Aramic script](https://codeforces.com/problemset/problem/975/A)
  - [SOLVEIT](https://codeforces.com/problemset/problem/975/A) - `Set + lower_bound()`
  - [Niceness of the string](https://www.spoj.com/problems/IITKWPCA/) - `Set + getline()`
  - [Friends of Friends](https://www.spoj.com/problems/FACEFRND/) - `Set or Bitset`
  - [Tom Riddle's Diary](https://codeforces.com/contest/855/problem/A)
  - [Indian Summer](https://codeforces.com/contest/44/problem/A) - `Set + Pair`
  - [Jesse and Cookies](https://www.hackerrank.com/challenges/jesse-and-cookies/problem?isFullScreen=true) - `Multiset`
  - [Distinct Digits]() - `Set or (Sort + unique())`
  - [Hongcow Learns the Cyclic Shift](https://codeforces.com/contest/745/problem/A) - `Set + rotate()`

## Map 
  - [Maps-STL](https://www.hackerrank.com/challenges/cpp-maps/problem)
  - [Find the Frequency](https://practice.geeksforgeeks.org/problems/find-the-frequency/1)
  - [Twice Counter](https://practice.geeksforgeeks.org/problems/twice-counter4236/1)
  - [Word with maximum frequency](https://practice.geeksforgeeks.org/problems/word-with-maximum-frequency0120/1)
  - [Tom Riddle's Diary](https://codeforces.com/contest/855/problem/A)
  - [Good Sequence](https://atcoder.jp/contests/arc087/tasks/arc087_a)
  - [Minimum Stocks](https://www.spoj.com/problems/MINSTOCK/)
  - [Boxes Packing](https://codeforces.com/contest/903/problem/C)
  - [T-shirt buying](https://codeforces.com/contest/799/problem/B)
  - [Array Division](https://codeforces.com/contest/808/problem/D)
  - [Roommate Agreement](https://www.spoj.com/problems/CRAN02/) - `Map + Math`
  - [Database](https://www.spoj.com/problems/RPLD/) - `Map of Sets`
  - [Polycarp's phone book](https://codeforces.com/contest/861/problem/D) - `Unordered Map of Sets`
  - [Hacking the random number generator](https://www.spoj.com/problems/HACKRNDM/)
  - [Travel Cards](https://codeforces.com/contest/847/problem/K) - `Map + Queue`
  - [Registration system](https://codeforces.com/contest/4/problem/C) - `Map + String`
  - [Unique Bid Auction](https://codeforces.com/contest/1454/problem/B)
  - [Grandfather Dovlet’s calculator](https://codeforces.com/contest/620/problem/B) - `Map or similar`
  - [Reachable Numbers](https://codeforces.com/contest/1157/problem/A) - `Map or Set`
  - [Gotta Catch Em' All!](https://codeforces.com/contest/757/problem/A) - `Map or similar`
  - [Divisible Pairs](https://codeforces.com/contest/1931/problem/D) - `Map + Math`

## Stack
  - [Maximum Element](https://www.hackerrank.com/challenges/maximum-element/problem?isFullScreen=true) 
  - [Equal Stacks](https://www.hackerrank.com/challenges/equal-stacks/problem?isFullScreen=true)
  - [Balanced Brackets](https://www.hackerrank.com/challenges/balanced-brackets/problem?isFullScreen=true)
  - [Simple Text Editor](https://www.hackerrank.com/challenges/simple-text-editor/problem?isFullScreen=true)
  - [Chocolate stack](https://www.hackerearth.com/practice/data-structures/stacks/basics-of-stacks/practice-problems/algorithm/chocolate-stack-746c1b56/)
  - [Jumpy Humpy](https://www.hackerearth.com/practice/data-structures/stacks/basics-of-stacks/practice-problems/algorithm/jumpy-humpy-5e0231d6/)
  - [Fun Game <Capillary>](https://www.hackerearth.com/practice/data-structures/stacks/basics-of-stacks/practice-problems/algorithm/fun-game-91510e9f/)
  - [Stack operations](https://www.hackerearth.com/practice/data-structures/stacks/basics-of-stacks/practice-problems/algorithm/stakth-1-e6a76632/)
  - [Good Indices](https://www.hackerearth.com/practice/data-structures/stacks/basics-of-stacks/practice-problems/algorithm/good-indices-c7058c9b/)
  - [Plug-in](https://codeforces.com/contest/81/problem/A)
  - [Okabe and Boxes](https://codeforces.com/contest/821/problem/C)
  - [Waiter](https://www.hackerrank.com/challenges/waiter/problem?isFullScreen=true)
  - [Game of Two Stacks](https://www.hackerrank.com/challenges/game-of-two-stacks/problem?isFullScreen=true)

## Queue
  - [Empty arrays](https://www.hackerearth.com/practice/data-structures/queues/basics-of-queues/practice-problems/algorithm/empty-array-31ed638c/)
  - [Disk tower](https://www.hackerearth.com/practice/data-structures/queues/basics-of-queues/practice-problems/algorithm/disk-tower-b7cc7a50/)
  - [Number Recovery](https://www.hackerearth.com/practice/data-structures/queues/basics-of-queues/practice-problems/algorithm/number-recovery-0b988eb2/)
  - [Castle on the Grid](https://www.hackerrank.com/challenges/castle-on-the-grid/problem?isFullScreen=true)
  - [Down to Zero II](https://www.hackerrank.com/challenges/down-to-zero-ii/problem?isFullScreen=true)
  - [Tea Queue](https://codeforces.com/contest/920/problem/B)

## Deque
  - [Deque-STL](https://www.hackerrank.com/challenges/deque-stl/problem)

## Priority Queue
  - [Reduce the array](https://www.spoj.com/problems/REDARR2/)

## Sort 
  - [Pairs STL 1](https://www.codechef.com/ABST2020/problems/PAIR/) - `Sort + Pair`
  - [Avoid Trygub](https://codeforces.com/contest/1450/problem/A) - `Sort + String`
  - [Squares](https://codeforces.com/contest/263/problem/B)
  - [Balanced Team](https://codeforces.com/problemset/problem/1133/C) - `Vector + Sort + upper_bound()`

## Miscellaneous
  - [Petya and Strings](https://codeforces.com/contest/112/problem/A) - `tolower()`

> [!TIP]
> [Codechef - Standard Template Library Contest](https://www.codechef.com/LRNDSA03?order=desc&sortBy=successful_submissions) is a good place to test your STL skills and learn something new while having fun.

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