题目 | Geometric Progression
AtCoder Beginner Contest 293
E - Geometric Progression
题目 | Serval and Shift-Shift-Shift
Codeforces Round #853 (Div. 2)
D. Serval and Shift-Shift-Shift
题目 | Even Sum Triplet
题目 | Abs Abs Function
题目 | Many Perfect Squares
Codeforces Round #844 (Div. 1 + Div. 2, based on VK Cup 2022 - Elimination Round)
D. Many Perfect Squares