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CodeForces 437B The Child and Set

CodeForces 76C Mutation

Codeforces 1528E Mashtali and Hagh Trees

CodeForces 1285D Dr. Evil Underscores

CodeForces 1288D Minimax Problem

CodeForces 1288E Messenger Simulator

CodeForces 1292B Aroma's Search

CodeForces 1292C Xenon's Attack on the Gangs

CodeForces 1294F Three Paths on a Tree

CodeForces 1299C Water Balance

CodeForces 1316E Team Building

Codeforces 1333C Eugene and an array

Codeforces 1333E Road to 1600