Links of Problems
Problem 1 - https://codeforces.com/problemset/problem/1689/C
Problem 2 - https://codeforces.com/problemset/problem/1687/A
Problem 3 - https://codeforces.com/problemset/problem/1680/C
Problem 4 - https://codeforces.com/problemset/problem/1677/A
Time Stamp
0:00 Problem 1 - C. Infected Tree
19:39 Problem 2 - A. The Enchanted Forest
38:47 Problem 3 - C. Binary String
01:09:48 Problems 4 - A. Tokitsukaze and Strange Inequality
