Instead of checking all possibilities (like brute force), a constructive algorithm constructs the answer directly by following a specific logic or set of rules. Problem List: https://codeforces.com/problemset/problem/1353/C https://codeforces.com/problemset/problem/1353/D https://codeforces.com...
However, some are somewhat constructive... → Reply EnumerativeCombinatorics 6 years ago, # ^ | 0 Well, a certain source you can also see confirmed this is not wrong, saying that they don’t write English editorials for ABC because they are not the main target currently. → Reply ...