为丰富同学们的业余文化生活，某高校学生会创办了3个兴趣小组
（以下称A组，B组，C组）。
每个小组的学生名单分别在【A.txt】,【B.txt】和【C.txt】中。
每个文件中存储的是学生的学号。
由于工作需要，我们现在想知道：
既参加了A组，又参加了B组，但是没有参加C组的同学一共有多少人？
请你统计该数字并通过浏览器提交答案。
注意：答案是一个整数，不要提交任何多余的内容。
笨笨有话说：
哇塞！数字好多啊！一眼望过去就能发现相同的，好像没什么指望。
不过，可以排序啊，要是每个文件都是有序的，那就好多了。
歪歪有话说：
排什么序啊，这么几行数字对计算机不是太轻松了吗？
我看着需求怎么和中学学过的集合很像啊…
思路：从txt文件中粘贴数据到eclipse时，注意要在txt文件中把前面有0的数据，进行清零。
（编辑->替换->查找内容：“（空格）0”，替换为（空）。）
注意：你黏贴进去之后，还是会有一个或则两个0开头的的数字，把多余的0删掉即可！！！
import java.util.Scanner;
public class Demo2兴趣小组 {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
int[] arr = { 12894792, 92774113, 59529208, 22962224, 2991600,
83340521, 87365045, 40818286, 16400628, 39475245, 55933381,
76940287, 61366748, 95631228, 17102313, 50682833, 61562613,
87002524, 83062019, 51743442, 61977890, 32010762, 69680621,
87179571, 81761697, 32364296, 7833271, 36198035, 26588918,
84046668, 43059468, 73191775, 56794101, 454780, 11141030,
10008994, 35072237, 44945158, 53959980, 75758119, 18560273,
35801494, 42102550, 22496415, 3981786, 34593672, 13074905,
7733442, 42374678, 23452507, 98586743, 30771281, 17703080,
52123562, 5898131, 56698981, 90758589, 18238802, 18217979,
4511837, 75682969, 31135682, 55379006, 42224598, 98263070,
40228312, 28924663, 11580163, 25686441, 45944028, 96731602,
53675990, 3854194, 14858183, 16866794, 40677007, 73141512,
32317341, 56641725, 43123040, 15201174, 62389950, 72887083,
76860787, 61046319, 6923746, 17874548, 46028629, 10577743,
48747364, 5328780, 59855415, 60965266, 20592606, 14471207,
70896866, 46938647, 33575820, 53426294, 56093931, 51326542,
94050481, 80114017, 33010503, 72971538, 22407422, 17305672,
78974338, 93209260, 83461794, 41247821, 26118061, 10657376,
42198057, 15338224, 50284714, 32232841, 26716521, 76048344,
23676625, 62897700, 69296551, 59653393, 38704390, 48481614,
69782897, 26850668, 37471053, 88720989, 51010849, 94951571,
60024611, 29808329, 70377786, 13899299, 9683688, 58218284,
46792829, 97221709, 45286643, 48158629, 57367208, 26903401,
76900414, 87927040, 9926730, 1508757, 15101101, 62491840,
43802529, };
int[] brr = { 44894050, 34662733, 44141729, 92774113, 99208727,
91919833, 23727681, 10003409, 55933381, 54443275, 13584702,
96523685, 50682833, 61562613, 62380975, 20311684, 93200452,
23101945, 42192880, 28992561, 18460278, 19186537, 58465301,
1111066, 62680429, 23721241, 20277631, 91708977, 57514737,
3981786, 81541612, 7346443, 93154608, 19709455, 37446968,
17703080, 72378958, 66200696, 30610382, 89586343, 33152171,
67040930, 35696683, 63242065, 99948221, 96233367, 52593493,
98263070, 1418023, 74816705, 89375940, 58405334, 96731602,
84089545, 16866794, 94737626, 01673442, 70548494, 13638168,
8163691, 11106566, 64375392, 40267902, 897705, 56447313,
54532235, 94738425, 66642634, 83219544, 40546096, 66924991,
20592606, 96037590, 73434467, 70896866, 91025618, 57892091,
8487641, 32500082, 84412833, 23311447, 38380409, 79957822,
72971538, 69645784, 91863314, 73099909, 93209260, 83461794,
81378487, 30423273, 22233715, 32232841, 26716521, 3511221,
29196547, 58263562, 56233305, 52547525, 55812835, 87253244,
52484232, 80837360, 94098464, 52028151, 53267501, 66381929,
84381316, 59788467, 9683688, 67082008, 71605255, 80654064,
21434307, 45286643, 76556656, 82465821, 57367208, 79218980,
48460468, 59170479, 46046391, 43043164, 96544490, 83340521,
70837892, 18926791, 40818286, 28936302, 11489524, 51031183,
73860337, 13241219, 9025448, 10718828, 76360986, 26031606,
76558053, 97726139, 46473415, 48406387, 23625539, 86756012,
35164187, 49161302, 78082834, 35072237, 8602486, 29815841,
56562216, 77684187, 81751704, 20160464, 50407962, 27786415,
19893526, 934129, 37759498, 52636463, 25666982, 43262852,
38393436, 2581136, 29323250, 56950657, 5898131, 95286262,
75574581, 54057961, 6703896, 90758589, 57782642, 34492535,
41919697, 6395464, 10993500, 81212949, 34017532, 69569396,
99009936, 57129610, 67401593, 71044018, 62076698, 29533873,
71936325, 86874388, 26545032, 35695544, 30433724, 53127345,
72887083, 25390873, 63711546, 6923746, 27783723, 33199575,
35929698, 16491251, 18276792, 62744775, 92096155, 6336570,
56141974, 73007273, 31416832, 0171057, 64176982, 46938647,
58460388, 69972026, 73724304, 27435484, 51568616, 15531822,
47788699, 11818851, 41594694, 83561325, 43107163, 56965375,
10557343, 26118061, 74650126, 90076467, 10657376, 49901436,
3425162, 61164599, 15797769, 5427896, 14444084, 36795868,
18079449, 59653393, 72942548, 6763077, 33895610, 94892653,
12085268, 65174140, 79567366, 23020126, 74290047, 13498869,
21696323, 27724594, 54941003, 38229841, 7050068, };
int[] crr = { 13404901, 39952424, 47847739, 94939581, 13809950,
70966043, 11161555, 17102313, 47079425, 50682833, 74154313,
61562613, 93200452, 37103342, 18479435, 32502597, 36198035,
54210010, 73191775, 48358178, 85544503, 5996766, 54651623,
52113220, 27465181, 23871783, 22496415, 54107041, 65899605,
56528700, 82671109, 61176034, 42374678, 51612628, 63329997,
56591652, 4552733, 12789324, 89586343, 51935014, 38611966,
43916409, 70996050, 98263070, 1418023, 65345049, 21734275,
76846198, 71506230, 833171, 67128139, 41367555, 64769510,
44010700, 16475199, 93164325, 9386162, 95324041, 80688223,
67629139, 79552617, 76219736, 50368644, 45096021, 54972488,
63779011, 28862942, 73145521, 74078605, 66924991, 12806850,
2171001, 70896866, 73434467, 8487641, 44415025, 32500082,
84412833, 83896188, 52243759, 49191410, 38744339, 48079796,
44937032, 06267501, 81866886, 38575984, 25978688, 78974338,
41247821, 12356966, 64842303, 79127158, 2366944, 68000570,
12426275, 96409230, 705972, 8266503, 83820884, 8831807,
43273308, 23216105, 29196547, 95160161, 05553537, 52182214,
32641346, 91553427, 24436506, 77433749, 1979664, 52028151,
88985343, 1761499, 76203088, 63237368, 23405334, 59788467,
9683688, 67755443, 29946533, 12053603, 437479, 15200030,
45286643, 93537527, 82465821, 57367208, 53899751, 15354933,
97760830, 68933762, 80220545, 1892750, 39868288, 21524323,
69716610, 65083815, 78048499, 3227391, 83340521, 87365045,
71720254, 51031183, 89168555, 8503028, 37086236, 25103057,
87002524, 22808816, 80928090, 90741678, 15993372, 99117082,
49938176, 21755083, 86903426, 87830263, 53959980, 75758119,
59781354, 58679691, 25666982, 56307643, 47180521, 62776522,
78136608, 44882734, 90758589, 8075999, 66303819, 23480347,
11580163, 87080118, 18329165, 92514163, 89404632, 92377859,
3912329, 17499963, 59699979, 79876366, 63894807, 37857001,
86003935, 90087123, 29433345, 80298948, 61531153, 61046319,
37839841, 19421134, 48747364, 35196916, 62484573, 59907079,
36845702, 21631642, 72739317, 26283700, 80114017, 76639390,
29154110, 35159758, 47788699, 11818851, 56520669, 36396767,
36031167, 83817428, 10657376, 90076467, 14676452, 11024560,
16327605, 76048344, 14444084, 95452011, 99612346, 65172562,
84813675, 88618282, 38704390, 27998014, 63859011, 33787505,
60024611, 16229880, 13899299, 35240335, 29173227, 45036451,
66177893, 82658333, 43100730, 44520187, 74290047, 85013538,
9926730, 27724594, 95148523, 20503000, 64390907, 26006953, };
int[]drr=new int[300]; //类似冒泡的一个东西，替换数组
int temp=0;
int sum=0;
for (int i = 0; i < arr.length; i++) {
for (int j = 0; j < brr.length; j++) {
if (arr[i]==brr[j]) {
drr[temp]=arr[i];
sum++;
temp++;
}
}
}
System.out.println(sum); //即参加AB组又参加C组的人
int count=0;
for (int i = 0; i < drr.length; i++) {
for (int j = 0; j < crr.length; j++) {
if (drr[i]==crr[j]) {
count++;
}
}
}
System.out.println(count); //参加C组又参加AB组的人
System.out.println(sum-count); //参加了AB组，但是没有参加C组的同学
}
}
小剧场：纤笔一枝谁与似？三千毛瑟精兵。
