Tree Game
F - Cumulative Cumulative Cumulative Sum
G - Prefix Concatenation
D - Bridges
F - Main Street
G - Scalene Triangle Area
Educational Codeforces Round 56 (Rated for Div. 2) D. Beautiful Graph
Codeforces Round #531 (Div. 3) E. Monotonic Renumeration
CodeCraft-19 and Codeforces Round #537 (Div. 2) B. Average Superhero Gang Power
CodeCraft-19 and Codeforces Round #537 (Div. 2) C. Creative Snap