Update the DIY user guide

docs/UserGuide.md

@@ -79,8 +79,25 @@ type the answer in the terminal and press ENTER/RETURN
 After finishing all the problem sets, the program will automate judged the correctness and output the accuracy and speed.
 
 ### DIY: `DIY`
+
 Add user DIY problem sets into our problem set datasets. The DIY problem set can also be saved and retried.
 
+**Format:** `DIY`
+
+- after input `DIY`:
+  1. System will output 
+   `Please input your DIY problemSet:
+    input the description of the problem (e.g. 1+2*3): `
+    user can input a user-defined problem into the system.
+  2. Then the System will ask for input:
+    `input the correct answer of the problem (e.g. 7): `
+    user should input the correct answer of the user-defined problem.
+  3. Then the System will ask:
+    `Do you finish adding problems? y/n: `
+    if user input `y`, which means no more problems will be added.
+    if user input `n`, the system will repeat step 1 to 3 until user input `y`.
+- user can see the type of the problem set, i.e. user - DIY or auto generated, in the records.
+
 ### Exit: `exit`
 
 User can use this to exit the program.

recordList.txt

@@ -1,27 +1 @@
-2024-04-10 15:14:24 0.05917159763313609 0.2 1131087689 83/9,9.222222222222221 18+0,18.0 16-16,0.0 68/4,17.0 4+61,65.0 30/8,3.75 78+53,131.0 92-22,70.0 51/7,7.285714285714286 28/7,4.0 
-2024-04-10 15:17:12 0.23255813953488372 0.0 -2045770529 6/4,1.5 68-46,22.0 35/1,35.0 71*76,5396.0 48+6,54.0 23/9,2.5555555555555554 60*98,5880.0 85*10,850.0 88*6,528.0 89+37,126.0 
-2024-04-10 15:17:28 0.6666666666666666 0.0 1314322124 51-6,45.0 68*42,2856.0 78+55,133.0 97-41,56.0 89-68,21.0 50/7,7.142857142857143 19*64,1216.0 31*57,1767.0 34*75,2550.0 4*71,284.0 
-2024-04-10 15:19:18 0.11494252873563218 0.0 308676570 6-12,-6.0 44-56,-12.0 68-98,-30.0 73-60,13.0 13-86,-73.0 36-14,22.0 81+13,94.0 74+46,120.0 51*82,4182.0 90-61,29.0 
-2024-04-10 15:20:47 0.14925373134328357 0.0 -2045770529 43-85,-42.0 86/7,12.285714285714286 67-9,58.0 46*21,966.0 98-69,29.0 72/5,14.4 16*41,656.0 34/3,11.333333333333334 7/9,0.7777777777777778 67+30,97.0 
-2024-04-10 15:23:41 0.06289308176100629 0.0 -2045770529 91-67,24.0 64+45,109.0 79-50,29.0 50*86,4300.0 85*50,4250.0 31/5,6.2 70*11,770.0 41/9,4.555555555555555 16-47,-31.0 69+88,157.0 
-2024-04-10 15:34:58 0.01524390243902439 0.0 -585014801 49+52,101.0 37+62,99.0 16+32,48.0 58+58,116.0 82-61,21.0 13+16,29.0 46/7,6.571428571428571 35*27,945.0 64+83,147.0 88/4,22.0 
-2024-04-10 15:37:53 0.11764705882352941 0.0 854452107 75-65,10.0 17/4,4.25 3/4,0.75 57/8,7.125 84*38,3192.0 79*92,7268.0 45+21,66.0 45*5,225.0 61-89,-28.0 62+68,130.0 
-2024-04-10 16:08:33 0.29411764705882354 0.4 1784552838 36+17,53.0 19+13,32.0 49/2,24.5 28+16,44.0 76+32,108.0 25*22,550.0 34+42,76.0 28-94,-66.0 0-72,-72.0 96/7,13.714285714285714 
-2024-04-10 16:19:08 0.20833333333333334 0.3 1784552838 53/6,8.833333333333334 1-71,-70.0 78-57,21.0 75-54,21.0 15/2,7.5 6+59,65.0 57+81,138.0 56+2,58.0 7-49,-42.0 33+87,120.0 
-2024-04-12 01:10:44 75.0 0.0 198423881 27/8,3.375 66+27,93.0 78+22,100.0 70-55,15.0 13*28,364.0 18+25,43.0 95-12,83.0 62-8,54.0 32+63,95.0 40-51,-11.0 
-2024-04-12 19:24:36 13.043478260869565 0.3 866946869 auto-generated 53+97,150.0 49+61,110.0 96+25,121.0 85+49,134.0 89+47,136.0 69+26,95.0 35+81,116.0 42+10,52.0 52+75,127.0 62+97,159.0 
-2024-04-12 19:34:18 17.647058823529413 0.0 -1373810849 auto-generated 968+304+865+4,2141.0 835+98+418+788,2139.0 827+771+487+344,2429.0 821+777+111+867,2576.0 835+998+587+909,3329.0 
-2024-04-12 19:41:45 14.285714285714285 0.0 -1373810849 auto-generated 747+52+919+275,1993.0 926+646+879+360,2811.0 711+534+426+205,1876.0 880+902+582+478,2842.0 733+691+735+486,2645.0 
-2024-04-12 19:42:28 30.0 0.0 2112549518 auto-generated 620+31+604+689+760,2704.0 499+280+887+838+908,3412.0 641+298+367+50+445,1801.0 39+221+523+808+283,1874.0 659+724+717+604+442,3146.0 
-2024-04-12 19:44:44 12.0 0.0 1172738166 auto-generated 458*578*175*214+956,9.913914756E9 739+391*66*576+409,1.4865404E7 616*462+514*677+278,632848.0 
-2024-04-12 19:51:06 3.103448275862069 0.0 -1383972449 auto-generated 73+12/6/3,73.66666666666667 95/2/4+52,63.875 76+53/9/5,77.17777777777778 
-2024-04-12 19:54:39 18.0 0.0 -2011367393 auto-generated 52/8/4/8,0.203125 33/4/1/9,0.9166666666666666 97+20/1/1,117.0 
-2024-04-12 20:04:45 6.428571428571428 0.0 -2011367393 auto-generated 71+3+88/8,85.0 79+5+36+41,161.0 47+97/9+46,103.77777777777777 
-2024-04-12 20:06:26 16.363636363636363 0.0 -2011367393 auto-generated 30+53/5/4,32.65 20+73+42/6,100.0 18+21+73+45,157.0 
-2024-04-12 20:09:30 18.461538461538463 0.0 1410862850 auto-generated 570/2/4/1,71.25 820+654+699+566,2739.0 771/7+113+759,982.1428571428571 862+671/4/8,882.96875 
-2024-04-12 20:10:12 22.5 0.0 1585670199 auto-generated 997+851+777/5,2003.4 478+937+475+340,2230.0 376/2/8+160,183.5 
-2024-04-12 20:10:40 15.0 0.0 -2096538833 auto-generated 30/9/8/2,0.20833333333333334 0/5/3/8,0.0 29+80/9+78,115.88888888888889 
-2024-04-12 20:20:33 16.363636363636363 0.0 -2011367393 auto-generated 51+55+5/2,108.5 82+3+64+15,164.0 32+73+52+72,229.0 
-2024-04-12 20:21:49 25.71428571428571 0.0 -1383972449 auto-generated 2+57/4/7,4.036 36/6/8+0,0.75 53+73/7/3,56.476 
-2024-04-12 20:22:33 18.0 0.0 -2011367393 auto-generated 5/4/3+42,42.417 72/8/2/4,1.125 40+21/7/9,40.333 
-2024-04-12 20:24:09 18.0 0.0 -2011367393 auto-generated 13+58+76/3,96.333 29/5/1/7,0.829 6+24/1+44,74.0 
+