Beautiful Garland
Codeforces Round #808 (Div. 1) A. Doremy’s IQ
Codeforces Round #811 (Div. 3) D. Color with Occurrences
Codeforces Round #817 (Div. 4) E. Counting Rectangles
Codeforces Round #823 (Div. 2) B. Meeting on the Line
Codeforces Round #826 (Div. 3) E. Sending a Sequence Over the Network
Partitions
MAXSPPROD
Kingdom War
Good Graph