题目 | Many Perfect Squares
Codeforces Round #844 (Div. 1 + Div. 2, based on VK Cup 2022 - Elimination Round)
D. Many Perfect Squares
题目 | Divisible Numbers
Codeforces Round #828 (Div. 3)
E1. Divisible Numbers (easy version)
https://codeforces.com/contest/1744/problem/E1
E2. Divisible Numbers (hard version)