From f1740ee2d7a5f0e4878ac7b2bc8c7ba03961795c Mon Sep 17 00:00:00 2001
From: "weiye.wang" <kj_wangweiye@126.com>
Date: Tue, 9 May 2023 22:27:04 +0800
Subject: [PATCH] =?UTF-8?q?=E5=BD=95=E5=85=A5=E7=AC=AC=E4=B8=89=E8=BD=AE?=
 =?UTF-8?q?=E5=A4=8D=E4=B9=A0=E8=AE=B2=E4=B9=89=E7=AD=94=E6=A1=88?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 工具/文本文件/metadata.txt | 185 +++++++++++++++++++++++++++++++++++--
 题库0.3/Problems.json      | 114 +++++++++++------------
 2 files changed, 233 insertions(+), 66 deletions(-)

diff --git a/工具/文本文件/metadata.txt b/工具/文本文件/metadata.txt
index 2c287290..15723c9a 100644
--- a/工具/文本文件/metadata.txt
+++ b/工具/文本文件/metadata.txt
@@ -1,15 +1,182 @@
 ans
-014613
-$(-8,-7)$
+014969
+$2\sqrt{2}-3$
 
-014615
-$\dfrac{\sqrt{2}}2$
+014970
+$[-1,0]$
 
-014961
-$\dfrac 23\sqrt{3}$
+014971
+$11$
 
-014953
-$a=3$, $b=4$
+014972
+$\dfrac{\pi}{9}$
 
-014962
+014965
+$(-\infty,8-4\sqrt{2}]$
+
+040558
+$[0,2-\ln 2]$
+
+014966
+D
+
+014968
+(1) 定值为$20$, 证明略; (2) $x=5$且$-5\le y\le 5$
+
+014973
+$\dfrac{2\sqrt{6}}3$
+
+
+040556
+(1) $[-\dfrac 43,0]$; (2) $50-6\sqrt{41}$; (3) $[2,5+3\sqrt{2}]$
+
+040560
+$(-\infty,\dfrac 12]$
+
+040563
+$(1,5)$
+
+040564
+$8$
+
+040568
+$\dfrac{29}{13}$
+
+014884
+$\{0\}\cup (1,3]$
+
+014887
+$(-\infty,-5]$
+
+014894
+B
+
+014897
+$(-\infty,-\dfrac 49)$
+
+014891
+(1) 证明略; (2) $f(x)=-\dfrac x{2+x}$; (3) $(\dfrac{1}{101},\dfrac{1}{99})$
+
+
+014725
+$2$或$\sqrt{6}$
+
+014924
+$36$
+
+014926
+B
+
+014733
+$(-\infty,-\dfrac{\sqrt{3a}}3]$和$[\dfrac{\sqrt{3a}}3,+\infty)$
+
+014882
+(1) 定值为$r$, 证明略; (2) 当$a=1$时, 周期为$1$; 当$a\in (0,1)\cup (1,+\infty)$时, 周期为$2$; (3) $S_n=n$($r=0$时)或$S_n=\dfrac 34n^2+\dfrac 54n$($r=3$时)
+
+014931
+$36$
+
+014736
+$(-\infty,-2]\cup [\dfrac 12,+\infty)$
+
+014930
+D
+
+014922
+$a=0$时, $f(x)$是偶函数; $a=1$时, $f(x)$是奇函数; $a\ne 0$且$a\ne 1$时, $f(x)$既不是奇函数, 又不是偶函数
+
+014925
+证明略
+
+
+014943
+$(\dfrac 32,2)$
+
+014909
+(1) $[-1,6]$; (2) $[-13,9]$
+
+031397
+$\{\dfrac 12\}$
+
+031398
+证明略
+
+031399
+(1) 存在, 理由略; (2) 存在, 理由略; (3) 存在, 理由略
+
+014944
+$12\pi$
+
+031400
+$(-\infty,-6)\cup (6,+\infty)$
+
+014989
+\textcircled{2}\textcircled{3}
+
+031401
+$\sqrt{10}$
+
+014910
+(1) (i) $A$与$B$被直线$l$分割; (ii) $A$与$C$不被直线$l$分割; (2) 如$x+y=0$, 理由略; (3) 证明略
+
+014987
+$4\pi$
+
+014913
+(1) $d(P_1,l_1)=1$, $d(P_2,l_1)=\sqrt{5}$;\\
+(2) $D=\left\{(x,y)|\begin{cases}x\ge 2, \\ (x-2)^2+(y-2)^2=1,\end{cases}\text{ 或 } \begin{cases} x\le =2, \\ (x+2)^2+(y-2)^2=1, \end{cases}\text{ 或 }\begin{cases} -2<x<2, \\ y=1 \text{或} 3\end{cases}\right\}$;\\
+(3) $\Omega = \{(0,y)|y \in \mathbf{R}\}$
+
+014990
+(1) 证明略; (2) $[-\dfrac 14,+\infty)$
+
+014914
+(1) 是$T$点列, 理由略; (2) 是钝角三角形, 证明略; (3) 证明略
+
+014911
+$(2,3)$
+
+014991
+A
+
+014992
+C
+
+014994
+\textcircled{2}\textcircled{4}
+
+014946
+证明略
+
+014995
+(1) $2,5,8,11,8,5,2$;\\
+(2) $k=13$时$S_{2k-1}$取到最大, 最大值为$626$;\\
+(3) 共有四种满足要求的数列:\\
+第一种: $1,2,\cdots,2^{m-2},2^{m-1},2^{m-1},2^{m-2},\cdots,2,1$($2m$项), $S_{2022}=\begin{cases}2^{m+1}-2^{2m-2022}-1, & 1500<m\le 2022,\\2^{2022}-1, & m \ge 2022;\end{cases}$\\
+第二种: $1,2,\cdots,2^{m-2},2^{m-1},2^{m-2},\cdots,2,1$($2m-1$项), $S_{2022}=\begin{cases}3\cdot 2^{m+1}-2^{2m-2023}-1, & 1500<m\le 2022,\\2^{2022}-1, & m \ge 2022;\end{cases}$\\
+第三种: $2^{m-1},2^{m-2},\cdots,2,1,1,2,\cdots,2^{m-2},2^{m-1}$($2m$项), $S_{2022}=\begin{cases}2^m+2^{2022-m}-2, & 1500<m\le 2022,\\2^m-2^{m-2022}, & m \ge 2022;\end{cases}$\\
+第四种: $2^{m-1},2^{m-2},\cdots,2,1,2,\cdots,2^{m-2},2^{m-1}$($2m$项), $S_{2022}=\begin{cases}2^m+2^{2023-m}-3, & 1500<m\le 2022,\\2^m-2^{m-2022}, & m \ge 2022;\end{cases}$
+
+014916
+是奇函数, 证明略
+
+014901
+\textcircled{3}
+
+014918
 (1) 证明略; (2) 证明略
+
+014919
+(1) 不是有界数列, 理由略; (2) 不是有界数列, 理由略
+
+014917
+是周期函数, 证明略
+
+014915
+证明略
+
+014905
+(1) $a_n=n+5$, $b_n=3n+2$; (2) 存在, $m=11$
+
+014907
+(1) $f_1(x)$存在短距, 不存在长距, $f_2(x)$存在短距, 也存在长距; (2) 存在满足条件的实数$a$, $a$的范围为$[-1,-\dfrac 12]\cup [\dfrac 52,5]$
\ No newline at end of file
diff --git a/题库0.3/Problems.json b/题库0.3/Problems.json
index 9e13a5ca..c75f02ef 100644
--- a/题库0.3/Problems.json
+++ b/题库0.3/Problems.json
@@ -384081,7 +384081,7 @@
         "objs": [],
         "tags": [],
         "genre": "填空题",
-        "ans": "",
+        "ans": "$2$或$\\sqrt{6}$",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -384241,7 +384241,7 @@
         "objs": [],
         "tags": [],
         "genre": "解答题",
-        "ans": "",
+        "ans": "$(-\\infty,-\\dfrac{\\sqrt{3a}}3]$和$[\\dfrac{\\sqrt{3a}}3,+\\infty)$",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -384301,7 +384301,7 @@
         "objs": [],
         "tags": [],
         "genre": "填空题",
-        "ans": "",
+        "ans": "$(-\\infty,-2]\\cup [\\dfrac 12,+\\infty)$",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -388171,7 +388171,7 @@
         "objs": [],
         "tags": [],
         "genre": "解答题",
-        "ans": "",
+        "ans": "(1) 定值为$r$, 证明略; (2) 当$a=1$时, 周期为$1$; 当$a\\in (0,1)\\cup (1,+\\infty)$时, 周期为$2$; (3) $S_n=n$($r=0$时)或$S_n=\\dfrac 34n^2+\\dfrac 54n$($r=3$时)",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -388211,7 +388211,7 @@
         "objs": [],
         "tags": [],
         "genre": "填空题",
-        "ans": "",
+        "ans": "$\\{0\\}\\cup (1,3]$",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -388271,7 +388271,7 @@
         "objs": [],
         "tags": [],
         "genre": "填空题",
-        "ans": "",
+        "ans": "$(-\\infty,-5]$",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -388351,7 +388351,7 @@
         "objs": [],
         "tags": [],
         "genre": "解答题",
-        "ans": "",
+        "ans": "(1) 证明略; (2) $f(x)=-\\dfrac x{2+x}$; (3) $(\\dfrac{1}{101},\\dfrac{1}{99})$",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -388411,7 +388411,7 @@
         "objs": [],
         "tags": [],
         "genre": "选择题",
-        "ans": "",
+        "ans": "B",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -388471,7 +388471,7 @@
         "objs": [],
         "tags": [],
         "genre": "解答题",
-        "ans": "",
+        "ans": "$(-\\infty,-\\dfrac 49)$",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -388551,7 +388551,7 @@
         "objs": [],
         "tags": [],
         "genre": "填空题",
-        "ans": "",
+        "ans": "\\textcircled{3}",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -388631,7 +388631,7 @@
         "objs": [],
         "tags": [],
         "genre": "解答题",
-        "ans": "",
+        "ans": "(1) $a_n=n+5$, $b_n=3n+2$; (2) 存在, $m=11$",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -388671,7 +388671,7 @@
         "objs": [],
         "tags": [],
         "genre": "解答题",
-        "ans": "",
+        "ans": "(1) $f_1(x)$存在短距, 不存在长距, $f_2(x)$存在短距, 也存在长距; (2) 存在满足条件的实数$a$, $a$的范围为$[-1,-\\dfrac 12]\\cup [\\dfrac 52,5]$",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -388711,7 +388711,7 @@
         "objs": [],
         "tags": [],
         "genre": "填空题",
-        "ans": "",
+        "ans": "(1) $[-1,6]$; (2) $[-13,9]$",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -388731,7 +388731,7 @@
         "objs": [],
         "tags": [],
         "genre": "解答题",
-        "ans": "",
+        "ans": "(1) (i) $A$与$B$被直线$l$分割; (ii) $A$与$C$不被直线$l$分割; (2) 如$x+y=0$, 理由略; (3) 证明略",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -388751,7 +388751,7 @@
         "objs": [],
         "tags": [],
         "genre": "填空题",
-        "ans": "",
+        "ans": "$(2,3)$",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -388793,7 +388793,7 @@
         "objs": [],
         "tags": [],
         "genre": "解答题",
-        "ans": "",
+        "ans": "(1) $d(P_1,l_1)=1$, $d(P_2,l_1)=\\sqrt{5}$;\\\\\n(2) $D=\\left\\{(x,y)|\\begin{cases}x\\ge 2, \\\\ (x-2)^2+(y-2)^2=1,\\end{cases}\\text{ 或 } \\begin{cases} x\\le =2, \\\\ (x+2)^2+(y-2)^2=1, \\end{cases}\\text{ 或 }\\begin{cases} -2<x<2, \\\\ y=1 \\text{或} 3\\end{cases}\\right\\}$;\\\\\n(3) $\\Omega = \\{(0,y)|y \\in \\mathbf{R}\\}$",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -388814,7 +388814,7 @@
         "objs": [],
         "tags": [],
         "genre": "解答题",
-        "ans": "",
+        "ans": "(1) 是$T$点列, 理由略; (2) 是钝角三角形, 证明略; (3) 证明略",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -388834,7 +388834,7 @@
         "objs": [],
         "tags": [],
         "genre": "解答题",
-        "ans": "",
+        "ans": "证明略",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -388854,7 +388854,7 @@
         "objs": [],
         "tags": [],
         "genre": "解答题",
-        "ans": "",
+        "ans": "是奇函数, 证明略",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -388874,7 +388874,7 @@
         "objs": [],
         "tags": [],
         "genre": "解答题",
-        "ans": "",
+        "ans": "是周期函数, 证明略",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -388894,7 +388894,7 @@
         "objs": [],
         "tags": [],
         "genre": "解答题",
-        "ans": "",
+        "ans": "(1) 证明略; (2) 证明略",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -388915,7 +388915,7 @@
         "objs": [],
         "tags": [],
         "genre": "解答题",
-        "ans": "",
+        "ans": "(1) 不是有界数列, 理由略; (2) 不是有界数列, 理由略",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -388975,7 +388975,7 @@
         "objs": [],
         "tags": [],
         "genre": "解答题",
-        "ans": "",
+        "ans": "$a=0$时, $f(x)$是偶函数; $a=1$时, $f(x)$是奇函数; $a\\ne 0$且$a\\ne 1$时, $f(x)$既不是奇函数, 又不是偶函数",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -389015,7 +389015,7 @@
         "objs": [],
         "tags": [],
         "genre": "填空题",
-        "ans": "",
+        "ans": "$36$",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -389035,7 +389035,7 @@
         "objs": [],
         "tags": [],
         "genre": "解答题",
-        "ans": "",
+        "ans": "证明略",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -389055,7 +389055,7 @@
         "objs": [],
         "tags": [],
         "genre": "选择题",
-        "ans": "",
+        "ans": "B",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -389135,7 +389135,7 @@
         "objs": [],
         "tags": [],
         "genre": "选择题",
-        "ans": "",
+        "ans": "D",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -389155,7 +389155,7 @@
         "objs": [],
         "tags": [],
         "genre": "填空题",
-        "ans": "",
+        "ans": "$36$",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -389411,7 +389411,7 @@
         "objs": [],
         "tags": [],
         "genre": "填空题",
-        "ans": "",
+        "ans": "$(\\dfrac 32,2)$",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -389431,7 +389431,7 @@
         "objs": [],
         "tags": [],
         "genre": "填空题",
-        "ans": "",
+        "ans": "$12\\pi$",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -389471,7 +389471,7 @@
         "objs": [],
         "tags": [],
         "genre": "解答题",
-        "ans": "",
+        "ans": "证明略",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -389851,7 +389851,7 @@
         "objs": [],
         "tags": [],
         "genre": "填空题",
-        "ans": "",
+        "ans": "$(-\\infty,8-4\\sqrt{2}]$",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -389871,7 +389871,7 @@
         "objs": [],
         "tags": [],
         "genre": "选择题",
-        "ans": "",
+        "ans": "D",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -389911,7 +389911,7 @@
         "objs": [],
         "tags": [],
         "genre": "解答题",
-        "ans": "",
+        "ans": "(1) 定值为$20$, 证明略; (2) $x=5$且$-5\\le y\\le 5$",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -389931,7 +389931,7 @@
         "objs": [],
         "tags": [],
         "genre": "填空题",
-        "ans": "",
+        "ans": "$2\\sqrt{2}-3$",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -389951,7 +389951,7 @@
         "objs": [],
         "tags": [],
         "genre": "填空题",
-        "ans": "",
+        "ans": "$[-1,0]$",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -389972,7 +389972,7 @@
         "objs": [],
         "tags": [],
         "genre": "填空题",
-        "ans": "",
+        "ans": "$11$",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -389992,7 +389992,7 @@
         "objs": [],
         "tags": [],
         "genre": "填空题",
-        "ans": "",
+        "ans": "$\\dfrac{\\pi}{9}$",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -390012,7 +390012,7 @@
         "objs": [],
         "tags": [],
         "genre": "解答题",
-        "ans": "",
+        "ans": "$\\dfrac{2\\sqrt{6}}3$",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -390292,7 +390292,7 @@
         "objs": [],
         "tags": [],
         "genre": "填空题",
-        "ans": "",
+        "ans": "$4\\pi$",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -390332,7 +390332,7 @@
         "objs": [],
         "tags": [],
         "genre": "填空题",
-        "ans": "",
+        "ans": "\\textcircled{2}\\textcircled{3}",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -390352,7 +390352,7 @@
         "objs": [],
         "tags": [],
         "genre": "解答题",
-        "ans": "",
+        "ans": "(1) 证明略; (2) $[-\\dfrac 14,+\\infty)$",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -390372,7 +390372,7 @@
         "objs": [],
         "tags": [],
         "genre": "选择题",
-        "ans": "",
+        "ans": "A",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -390392,7 +390392,7 @@
         "objs": [],
         "tags": [],
         "genre": "选择题",
-        "ans": "",
+        "ans": "C",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -390434,7 +390434,7 @@
         "objs": [],
         "tags": [],
         "genre": "填空题",
-        "ans": "",
+        "ans": "\\textcircled{2}\\textcircled{4}",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -390454,7 +390454,7 @@
         "objs": [],
         "tags": [],
         "genre": "解答题",
-        "ans": "",
+        "ans": "(1) $2,5,8,11,8,5,2$;\\\\\n(2) $k=13$时$S_{2k-1}$取到最大, 最大值为$626$;\\\\\n(3) 共有四种满足要求的数列:\\\\\n第一种: $1,2,\\cdots,2^{m-2},2^{m-1},2^{m-1},2^{m-2},\\cdots,2,1$($2m$项), $S_{2022}=\\begin{cases}2^{m+1}-2^{2m-2022}-1, & 1500<m\\le 2022,\\\\2^{2022}-1, & m \\ge 2022;\\end{cases}$\\\\\n第二种: $1,2,\\cdots,2^{m-2},2^{m-1},2^{m-2},\\cdots,2,1$($2m-1$项), $S_{2022}=\\begin{cases}3\\cdot 2^{m+1}-2^{2m-2023}-1, & 1500<m\\le 2022,\\\\2^{2022}-1, & m \\ge 2022;\\end{cases}$\\\\\n第三种: $2^{m-1},2^{m-2},\\cdots,2,1,1,2,\\cdots,2^{m-2},2^{m-1}$($2m$项), $S_{2022}=\\begin{cases}2^m+2^{2022-m}-2, & 1500<m\\le 2022,\\\\2^m-2^{m-2022}, & m \\ge 2022;\\end{cases}$\\\\\n第四种: $2^{m-1},2^{m-2},\\cdots,2,1,2,\\cdots,2^{m-2},2^{m-1}$($2m$项), $S_{2022}=\\begin{cases}2^m+2^{2023-m}-3, & 1500<m\\le 2022,\\\\2^m-2^{m-2022}, & m \\ge 2022;\\end{cases}$",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -529906,7 +529906,7 @@
         "objs": [],
         "tags": [],
         "genre": "解答题",
-        "ans": "",
+        "ans": "$\\{\\dfrac 12\\}$",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -529929,7 +529929,7 @@
         "objs": [],
         "tags": [],
         "genre": "解答题",
-        "ans": "",
+        "ans": "证明略",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -529952,7 +529952,7 @@
         "objs": [],
         "tags": [],
         "genre": "解答题",
-        "ans": "",
+        "ans": "(1) 存在, 理由略; (2) 存在, 理由略; (3) 存在, 理由略",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -529977,7 +529977,7 @@
         "objs": [],
         "tags": [],
         "genre": "填空题",
-        "ans": "",
+        "ans": "$(-\\infty,-6)\\cup (6,+\\infty)$",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -530000,7 +530000,7 @@
         "objs": [],
         "tags": [],
         "genre": "填空题",
-        "ans": "",
+        "ans": "$\\sqrt{10}$",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -542116,7 +542116,7 @@
         "objs": [],
         "tags": [],
         "genre": "填空题",
-        "ans": "",
+        "ans": "(1) $[-\\dfrac 43,0]$; (2) $50-6\\sqrt{41}$; (3) $[2,5+3\\sqrt{2}]$",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -542158,7 +542158,7 @@
         "objs": [],
         "tags": [],
         "genre": "填空题",
-        "ans": "",
+        "ans": "$[0,2-\\ln 2]$",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -542198,7 +542198,7 @@
         "objs": [],
         "tags": [],
         "genre": "填空题",
-        "ans": "",
+        "ans": "$(-\\infty,\\dfrac 12]$",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -542258,7 +542258,7 @@
         "objs": [],
         "tags": [],
         "genre": "填空题",
-        "ans": "",
+        "ans": "$(1,5)$",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -542278,7 +542278,7 @@
         "objs": [],
         "tags": [],
         "genre": "填空题",
-        "ans": "",
+        "ans": "$8$",
         "solution": "",
         "duration": -1,
         "usages": [],
@@ -542360,7 +542360,7 @@
         "objs": [],
         "tags": [],
         "genre": "填空题",
-        "ans": "",
+        "ans": "$\\dfrac{29}{13}$",
         "solution": "",
         "duration": -1,
         "usages": [],