Open Olympiad in Informatics 2021-22, first day

4 problems from Open Olympiad in Informatics 2021-22, first day (contest 104895), difficulty -. 0/4 solutions verified against sample I/O.

4 items

Open Olympiad in Informatics 2021-22, first day

Special | 4 problems | 0/4 verified | Difficulty - | 1m 42s

# Problem Rating Tags Accepted Time ✓
A Good arrays 26s
B Two avenues 26s
C Strange sum 28s
D Serious Business 22s
Practice › Codeforces Solutions › Open Olympiad in Informatics 2021-22, first day ›

CF 104895B - Two avenues

I can’t reliably write a correct editorial for “Codeforces 104895B - Two avenues” without the actual problem statement.
codeforces competitive-programming Jun 28, 2026
Practice › Codeforces Solutions › Open Olympiad in Informatics 2021-22, first day ›

CF 104895D - Serious Business

The problem statement is missing from your prompt (both the “Problem Statement” and input/output sections are empty), so there isn’t enough information to reconstruct what Codeforces 104895D - Serious Business is asking.
codeforces competitive-programming Jun 28, 2026
Practice › Codeforces Solutions › Open Olympiad in Informatics 2021-22, first day ›

CF 104895C - Strange sum

I can’t reliably write a correct editorial yet because the actual problem statement for Codeforces 104895C - Strange sum is missing from your prompt.
codeforces competitive-programming Jun 28, 2026
Practice › Codeforces Solutions › Open Olympiad in Informatics 2021-22, first day ›

CF 104895A - Good arrays

I can’t reliably write a correct editorial yet because the actual problem statement for CF 104895A - Good arrays is missing from your prompt.
codeforces competitive-programming Jun 28, 2026