below 1500 1921D - Very Different Array 1920B - Summation Game 158B - Taxi 492B - Vanya and Lanterns 466A - Cheap Travel 706B - Interesting drink 1925B - A Balanced Problemset? 1922C - Closest Cities 189A - Cut Ribbon 1352C - K-th Not Divisible by n 1500 455A - Boredom 580C - Kefa and Park 580B - Kefa and Company 550A - Two Substrings 550 C - Divisibility by Eight 545C - Woodcutters 1700 466C - Number of Ways 339D - Xenia and Bit Operations 1800 478C - Table Decorations 448D - Multiplication Table 161D - Distance in Tree 1509C - The Sports Festival 1398D - Colored Rectangles 1396B - Stoned Game 271D - Good Substrings 1475D - Cleaning the Phone 1326D1 - Prefix-Suffix Palindrome (Easy version) 118D - Caesar’s Legions