求助:如何用js统计出class为c1和c_1的数量
<div class="c1">
<div class="c_1">
<div class="t_img">
<div class="numm_1">03</div>
</div>
</div>
<div class="c1">
<div class="c_1">
<div class="t_img">
<div class="numm_1">02</div>
</div>
</div>
<div class="c1">
<div class="c_1">
<div class="t_img">
<div class="numm_1">01</div>
</div>
</div>
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