this is for holding javascript data
Dat Do edited beginproblem_a_You_a.tex
about 10 years ago
Commit id: abda49e0475c463418aa48be615be047f51fd0e9
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\end{problem}
\textbf{Solution 1: }
Since we are receiving one extra coupon for each consecutive day, the total coupons received for $n$ days can be represented as $\sum\limits_{i=1}^n i$ =
\frac{n(n+1)}{2} $\frac{n(n+1)}{2}$