Data Structures Guessing Game

You're bored in your Data Structures class, so your friend suggests you both play a game. Your friend will think of a number, from $1$ to $n$, and you must guess what the number is. After your guess, your friend will tell you if it was correct, or if the actual number is higher or lower than your guess. What is the minimum number of guesses, $m$, that guarantees you get the correct answer? Provide your answer when $n=8198$.