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 | Even Subarrays
Codeforces Round #841 (Div. 2) and Divide by Zero 2022
C. Even Subarrays
题目 | All Possible Digits
题目 | Counting Arrays
Educational Codeforces Round 138 (Rated for Div. 2)
D. Counting Arrays
题目 | Problem with Random Tests
Educational Codeforces Round 137 (Rated for Div. 2)
D. Problem with Random Tests