蓝桥杯-第八届省赛第二题_大恐Rong๛ก(ー̀ωー́ก)的博客-程序员宝宝

技术标签: 暴力破解  

题目

标题:兴趣小组

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…

过程

public class action1 {
	public static void main(String[] args) {
		int a[] = { 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, 07733442,
				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 b[] = { 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, 1673442, 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, 171057, 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 c[] = { 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, 98116293,
				97457666, 29017396, 4634371, 70791589 };
		int d[]=new int[300];
		int sum = 0;
		for (int i = 0; i < a.length; i++) {
			for (int j = 0; j < b.length; j++) {
			//AB相同sum++
				if (a[i]==b[j]) {
					sum++;
				}
			}
		}
		for (int i = 0; i < a.length; i++) {	
			for (int j = 0; j < b.length; j++) {
			//AB两个相同
				if (a[i]==b[j]) {
					for (int j2 = 0; j2 < c.length; j2++) {
					//c跟AB相同就减去
						if (b[j]==c[j2]) {
							sum--;
						}
						
					}
				}
				}
			}
		System.out.println(sum);
		}
	}


答案

20

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本文链接:https://blog.csdn.net/qq_44561488/article/details/87873939

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