Codeforces Round #481 (Div. 3) D. Almost Arithmetic Progression
Codeforces Round #481 (Div. 3) F. Mentors
Codeforces Round #484 (Div. 2) C. Cut ‘em all!
Educational Codeforces Round 44 (Rated for Div. 2) C. Liebig’s Barrels
Educational Codeforces Round 45 (Rated for Div. 2) C. Bracket Sequences Concatenation Problem
Educational Codeforces Round 46 (Rated for Div. 2) B. Light It Up
Codeforces Round #491 (Div. 2) C. Candies
Codeforces Round #491 (Div. 2) D. Bishwock
Codeforces Round #493 (Div. 1) A. Convert to Ones
Educational Codeforces Round 135 (Rated for Div. 2) C. Digital Logarithm