CF1477E - Nezzar and Tournaments
CF1411F - the Thorny Path
CF1456E - XOR-Ranges
CF1452G - Game on Tree
CF1051G - Distinctification
CF715E - Complete the Permutations
CF1503E - 2-Coloring
CF1392H - ZS Shuffles Cards
CF1499G - Graph Coloring
CF1288F - Red-Blue Graph