ABBYY Cup 2.0 - Hard D2. Magic Squares
ABBYY Cup 2.0 - Hard D1. Magic Squares
Codeforces Round #119 (Div. 1) A. Permutations
Codeforces Round #120 (Div. 2) C. STL
Codeforces Round #121 (Div. 1) A. Dynasty Puzzles
Maximum Unsorted Subarray
Largest Coprime Divisor
Matrix Median
Maximum Absolute Difference
Find Permutation