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interactive problems
Problem Name Online Judge Contest Difficulty Level
1 Bear and Prime 100 Categories Codeforces Codeforces Round #356 (Div. 1) & Codeforces Round #356 (Div. 2) 2
2 Guess the Array Categories Codeforces Technocup 2017 - Elimination Round 1 (Unofficially Open for Everyone, Rated for Div. 2) 4
3 Interactive LowerBound Categories Codeforces AIM Tech Round 4 (Div. 1) & AIM Tech Round 4 (Div. 2) 5
4 Pick Heroes Categories Codeforces Mail.Ru Cup 2018 Round 3 5
5 Subway Pursuit Categories Codeforces Codeforces Round #507 (Div. 1, based on Olympiad of Metropolises) & Codeforces Round #507 (Div. 2, based on Olympiad of Metropolises) 6
6 Searching Rectangles Categories Codeforces Codeforces Round #371 (Div. 1) & Codeforces Round #371 (Div. 2) 6
7 Vladik and Favorite Game Categories Codeforces Codeforces Round #416 (Div. 2) 6
8 Glad to see you! Categories Codeforces Codeforces Round #415 (Div. 1) & Codeforces Round #415 (Div. 2) 6
9 Divisors Categories Codeforces Lyft Level 5 Challenge 2018 - Elimination Round 6
10 Mahmoud and Ehab and the binary string Categories Codeforces Codeforces Round #435 (Div. 2) 6
11 Interactive Bulls and Cows (Easy) Categories Codeforces Testing Round #13 7
12 Something with XOR Queries Categories Codeforces Technocup 2018 - Elimination Round 2 7
13 The penguin's game Categories Codeforces Codeforces Round #427 (Div. 2) 8
14 Interactive Bulls and Cows (Hard) Categories Codeforces Testing Round #13 9