Hi guys, I'm Cuong 👋. No. Problem Title Organization Solution Algorithm 1 A. Numbers Codeforces 1.cpp math 2 A. Fashion in Berland Codeforces 2.cpp logic 3 A. Night at the Museum Codeforces 3.cpp logic 4 A. Bear and Game Codeforces 4.cpp logic 5 A. Arrays Codeforces 5.cpp sort 6 A. Vitaly and Strings Codeforces 6.cpp logic 7 B. African Crossword Codeforces 7.cpp logic 8 B. Big Segment Codeforces 8.cpp logic 9 B. Passwords Codeforces 9.cpp math 10 A. Dress'em in Vests! Codeforces 10.cpp logic 11 A. Sereja and Dima Codeforces 11.cpp logic 12 B. Approximating a Constant Range Codeforces 12.cpp 2-pointer 13 B. Array Codeforces 13.cpp 2-pointer 14 B. Balls Game Codeforces 14.cpp 2-pointer 15 B. Books Codeforces 15.cpp 2-pointer 16 B. George and Round Codeforces 16.cpp 2-pointer 17 C. Alice, Bob and Chocolate Codeforces 17.cpp 2-pointer 18 A. Business trip Codeforces 18.cpp sort 19 A. Chores Codeforces 19.cpp sort 20 A. GukiZ and Contest Codeforces 20.cpp sort 21 A. Towers Codeforces 21.cpp logic 22 B. Devu, the Dumb Guy Codeforces 22.cpp sort 23 B. Eight Point Sets Codeforces 23.cpp sort, logic 24 B. Pasha and Tea Codeforces 24.cpp sort, logic 25 B. Sort the Array Codeforces 25.cpp sort, logic, 2-pointer 26 Compilers and parsers Codechef 26.cpp greedy 27 MMASS - Mass of Molecule SPOJ 27.cpp stack 28 STPAR - Street Parade SPOJ 28.cpp stack 29 ONP - Transform the Expression SPOJ 29.cpp stack 30 10935 - Throwing cards away I UVA 30.cpp queue 31 12207 - That is Your Queue UVA 31.cpp queue 32 10901 - Ferry Loading III UVA 32.cpp queue 33 UCV2013H - Slick SPOJ 33.py bfs 34 MAKEMAZE - VALIDATE THE MAZE SPOJ 34.py bfs 35 Guilty Prince LightOJ 35.py bfs 36 Dhoom 4 HackerEarth 36.py bfs 37 Breadth First Search: Shortest Reach HackerRank 37.py bfs 38 C. Ice Cave Codeforces 38.py bfs 39 Valid Parentheses LeetCode 39.py logic 40 C. Kefa and Park Codeforces 40.py bfs 41 1610 - Dudu Service Maker UVA 41.py dfs 42 D. Lakes in Berland Codeforces 42.py dfs 43 CAM5 - prayatna PR SPOJ 43.cpp dfs 44 BENEFACT - The Benefactor SPOJ 44.py dfs 45 LASTSHOT - THE LAST SHOT SPOJ 45.go dfs 46 10954 - Add All UVA 46.py heap 47 11995 - I Can Guess the Data Structure! UVA 47.py heap, stack,queue 48 Monk and Multiplication HackerEarth 48.py heap 49 QHEAP1 HackerRank 49.py heap 50 Restaurant Rating CodeChef 50.py heap 51 Roy and Trending Topics HackerEarth 51.py heap 52 Two Sum LeetCode 52.py logic 53 Ransom Note LeetCode 53.py logic 54 Best Time to Buy and Sell Stock II LeetCode 54.py logic 55 Palindrome Number LeetCode 55.py logic 56 Roman to Integer LeetCode 56.py logic 57 Longest Common Prefix LeetCode 57.py sort 58 Summary Ranges LeetCode 58.py logic 59 Equal Row and Column Pairs LeetCode 59.py hash 60 Minimum Absolute Difference in BST LeetCode 60.py dfs 61 Maximum Level Sum of a Binary Tree LeetCode 61.py dfs