<div class="row" style="margin-right:-15px; margin-left:-15px; color:rgb(55,58,60); font-size:16px; line-height:24px">
<div id="prob-title-contest" style="padding-left:60px">
<h2 id="problem-title" style="margin-top:0px; margin-bottom:0.5rem; font-family:inherit; font-weight:500; line-height:1.1; color:inherit; font-size:2rem; display:inline"> J - Key Set</h2>
<span class="origin" style="padding-left:20px"></span>
</div>
<div id="prob-title-contest" style="padding-left:60px">
<br>
</div>
<div>
<dd style="">
<div class="panel_content">
soda has a set
<span class="MathJax" id="MathJax-Element-2-Frame" style="display:inline; word-spacing:normal; word-wrap:normal; white-space:nowrap; float:none; direction:ltr; max-width:none; max-height:none; min-width:0px; min-height:0px; border:0px; padding:0px; margin:0px; position:relative" tabindex="0">
<span class="math" id="MathJax-Span-10" style="display:inline-block; position:static; border:0px; padding:0px; margin:0px; vertical-align:0px; width:0.812em"><span style="display:inline-block; position:relative; border:0px; padding:0px; margin:0px; vertical-align:0px; width:0.758em; height:0px; font-size:18.54px"><span style="position:absolute; border:0px; padding:0px; margin:0px; vertical-align:0px; top:-2.209em; left:0em"><span class="mrow" id="MathJax-Span-11" style="display:inline; position:static; border:0px; padding:0px; margin:0px; vertical-align:0px"><span class="mi" id="MathJax-Span-12" style="display:inline; position:static; border:0px; padding:0px; margin:0px; vertical-align:0px; font-family:MathJax_Math-italic">S<span style="display:inline-block; position:static; border:0px; padding:0px; margin:0px; vertical-align:0px; overflow:hidden; height:1px; width:0.057em"></span></span></span><span style="display:inline-block; position:static; border:0px; padding:0px; margin:0px; vertical-align:0px; width:0px; height:2.214em"></span></span></span><span style="display:inline-block; position:static; border-width:0px; border-left-style:solid; border-color:initial; padding:0px; margin:0px; vertical-align:-0.053em; overflow:hidden; width:0px; height:0.836em"></span></span>
<span class="MJX_Assistive_MathML" style="">S</span></span> with
<span class="MathJax" id="MathJax-Element-3-Frame" style="display:inline; word-spacing:normal; word-wrap:normal; white-space:nowrap; float:none; direction:ltr; max-width:none; max-height:none; min-width:0px; min-height:0px; border:0px; padding:0px; margin:0px; position:relative" tabindex="0">
<span class="math" id="MathJax-Span-13" style="display:inline-block; position:static; border:0px; padding:0px; margin:0px; vertical-align:0px; width:0.65em"><span style="display:inline-block; position:relative; border:0px; padding:0px; margin:0px; vertical-align:0px; width:0.596em; height:0px; font-size:18.54px"><span style="position:absolute; border:0px; padding:0px; margin:0px; vertical-align:0px; top:-2.209em; left:0em"><span class="mrow" id="MathJax-Span-14" style="display:inline; position:static; border:0px; padding:0px; margin:0px; vertical-align:0px"><span class="mi" id="MathJax-Span-15" style="display:inline; position:static; border:0px; padding:0px; margin:0px; vertical-align:0px; font-family:MathJax_Math-italic">n</span></span><span style="display:inline-block; position:static; border:0px; padding:0px; margin:0px; vertical-align:0px; width:0px; height:2.214em"></span></span></span><span style="display:inline-block; position:static; border-width:0px; border-left-style:solid; border-color:initial; padding:0px; margin:0px; vertical-align:-0.053em; overflow:hidden; width:0px; height:0.558em"></span></span>
<span class="MJX_Assistive_MathML" style="">n</span></span> integers
<span class="MathJax" id="MathJax-Element-4-Frame" style="display:inline; word-spacing:normal; word-wrap:normal; white-space:nowrap; float:none; direction:ltr; max-width:none; max-height:none; min-width:0px; min-height:0px; border:0px; padding:0px; margin:0px; position:relative" tabindex="0">
<span class="math" id="MathJax-Span-16" style="display:inline-block; position:static; border:0px; padding:0px; margin:0px; vertical-align:0px; width:5.558em"><span style="display:inline-block; position:relative; border:0px; padding:0px; margin:0px; vertical-align:0px; width:5.396em; height:0px; font-size:18.54px"><span style="position:absolute; border:0px; padding:0px; margin:0px; vertical-align:0px; top:-2.209em; left:0em"><span class="mrow" id="MathJax-Span-17" style="display:inline; position:static; border:0px; padding:0px; margin:0px; vertical-align:0px"><span class="mo" id="MathJax-Span-18" style="display:inline; position:static; border:0px; padding:0px; margin:0px; vertical-align:0px; font-family:MathJax_Main">{<!-- --></span><span class="mn" id="MathJax-Span-19" style="display:inline; position:static; border:0px; padding:0px; margin:0px; vertical-align:0px; font-family:MathJax_Main">1</span><span class="mo" id="MathJax-Span-20" style="display:inline; position:static; border:0px; padding:0px; margin:0px; vertical-align:0px; font-family:MathJax_Main">,</span><span class="mn" id="MathJax-Span-21" style="display:inline; position:static; border:0px; padding:0px 0px 0px 0.165em; margin:0px; vertical-align:0px; font-family:MathJax_Main">2</span><span class="mo" id="MathJax-Span-22" style="display:inline; position:static; border:0px; padding:0px; margin:0px; vertical-align:0px; font-family:MathJax_Main">,</span><span class="mo" id="MathJax-Span-23" style="display:inline; position: |
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