deletions | additions       diff --git a/beginproblem_a_You_a.tex b/beginproblem_a_You_a.tex  index dbbb39c..e85d427 100644  --- a/beginproblem_a_You_a.tex  +++ b/beginproblem_a_You_a.tex 
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\begin{problem} \textit{}\begin{problem}  \textbf{Problem1: }(a) You are eagerly waiting for the delivery of your smart phone. For each day the delivery is late,  the phone company compensates you by giving you coupons. The number of coupons you get  for each day is equal to the number of days the delivery is late. For example, if your phone is 
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look them up.  \end{problem}  \begin{solution}  \textbf{Solution 1: }