修改13921题面
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@ -1,6 +1,6 @@
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import os,re,json
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"""这里编辑题号(列表)后将在vscode中打开窗口, 编辑后保存关闭, 随后运行第二个代码块"""
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problems = "15097,15098"
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problems = "13921"
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def generate_number_set(string,dict):
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string = re.sub(r"[\n\s]","",string)
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@ -363533,7 +363533,7 @@
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},
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"013921": {
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"id": "013921",
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"content": "数列$\\{a_n\\}$的前$n$项和为$S_n, 2S_n-n a_n=n$($n \\in \\mathbf{N}$, $n\\ge 1$), 若$S_{20}=-360$, 则$a_2=$\\blank{50}.",
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"content": "数列$\\{a_n\\}$的前$n$项和为$S_n$, $2S_n-n a_n=n$($n \\in \\mathbf{N}$, $n\\ge 1$), 若$S_{20}=-360$, 则$a_2=$\\blank{50}.",
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"objs": [],
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"tags": [
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"第四单元"
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