The dreaded sequence

In a game of tossing coins, a player is required to toss a coin $k$ times in one go and has to repeat it $n$ times. Heads is denoted by 1 and Tails by 0. You are given an array of size $n$ containing the sequences of tosses in decimal. You are required to print the unique sequence of coin tosses for the player or the XOR of unique sequences, if more than one exist. A sequence can be unique or repe