STL Vector

1. Sereja and Dima Link: https://codeforces.com/problemset/problem/381/A

2. Distinct Count Link: https://www.hackerearth.com/practice/data-structures/trees/binary-search-tree/practice-problems/algorithm/distinct-count/

STL String

1. String Task Link: https://codeforces.com/problemset/problem/118/A

2. The Palindrome Link: https://www.hackerearth.com/problem/algorithm/the-palindrome-2/

3. Petya and Strings Link: https://codeforces.com/contest/112/problem/A

4. Haiku Link: https://codeforces.com/contest/78/problem/A

5. LexoGeek Link: https://www.hackerearth.com/problem/algorithm/lexogeek-e6450fb7/

6. Dubstep Link: https://codeforces.com/problemset/problem/208/A

7. Pangram Link: https://codeforces.com/contest/520/problem/A

STL Pair

1. Indian Summer Link: https://codeforces.com/contest/44/problem/A

2. Rank List Link: https://codeforces.com/problemset/problem/166/A

3. Games Link: https://codeforces.com/contest/268/problem/A

STL Map

1. Tom Riddle's Diary Link: https://codeforces.com/contest/855/problem/A

2. Good Sequence Link: https://atcoder.jp/contests/arc087/tasks/arc087_a

3. Registration system Link: https://codeforces.com/contest/4/problem/C

4. Radio Station Link: https://codeforces.com/contest/918/problem/B

5. Boxes Packing Link: https://codeforces.com/contest/903/problem/C

STL Set

1. I Wanna Be the Guy Link: https://codeforces.com/problemset/problem/469/A

2. Second Order Statistics Link: https://codeforces.com/problemset/problem/22/A

STL Stack

1. Balanced Brackets Link: https://www.hackerrank.com/challenges/balanced-brackets/problem

STL Deque

1. Deque-STL Link: https://www.hackerrank.com/challenges/deque-stl/problem

STL Priority queue

1. Monk and Multiplication Link: https://www.hackerearth.com/practice/data-structures/trees/heapspriority-queues/practice-problems/algorithm/monk-and-multiplication/

2. T-shirt buying Link: https://codeforces.com/contest/799/problem/B

3. Monk And Champions League Link: https://www.hackerearth.com/practice/data-structures/trees/heapspriority-queues/practice-problems/algorithm/monk-and-champions-league/

4. Reduce the array Link: https://www.spoj.com/problems/REDARR2/