{"trustable":false,"prependHtml":"\u003cscript\u003e window.katexOptions \u003d { disable: true }; \u003c/script\u003e\n\u003cscript type\u003d\"text/x-mathjax-config\"\u003e\n MathJax.Hub.Config({\n tex2jax: {\n inlineMath: [[\u0027$$$\u0027,\u0027$$$\u0027], [\u0027$\u0027,\u0027$\u0027]],\n displayMath: [[\u0027$$$$$$\u0027,\u0027$$$$$$\u0027], [\u0027$$\u0027,\u0027$$\u0027]]\n }\n });\n\u003c/script\u003e\n\u003cscript async src\u003d\"https://mathjax.codeforces.org/MathJax.js?config\u003dTeX-AMS-MML_HTMLorMML\" type\u003d\"text/javascript\"\u003e\u003c/script\u003e","sections":[{"title":"","value":{"format":"HTML","content":"\u003cscript type\u003d\u0027text/x-mathjax-config\u0027\u003eMathJax.Hub.Config({tex2jax: { inlineMath: [[\u0027$\u0027,\u0027$\u0027]] } }); \u003c/script\u003e\n\u003cscript type\u003d\u0027text/javascript\u0027 src\u003d\u0027https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config\u003dTeX-AMS-MML_HTMLorMML\u0027\u003e\u003c/script\u003e\n\u003cscript type\u003d\u0027text/javascript\u0027\u003esetTimeout(function(){MathJax.Hub.Queue([\u0027Typeset\u0027, MathJax.Hub, \u0027left_view\u0027]);}, 2000);\u003c/script\u003e\n\u003cdiv class\u003d\"panel_content\"\u003e\n 今天是圣诞节,大家圣诞快乐呀~^v^~\n \u003cbr\u003e \n \u003cbr\u003e 小晨学姐给你们准备了礼物哟~数量有限(只有10个)手快者,能优先挑选口味哟~\n \u003cbr\u003e \n\u003cbr\u003e小晨学姐拿来了 A, B两袋糖果,每种糖果都有一个编号。这A,B两袋糖果中的糖果编号分别都是唯一的(A,B两袋里面可能会出现相同种类糖果,即编号相同)。\n \u003cbr\u003e \n\u003cbr\u003e现在,小晨想知道当从A袋中拿走和B袋中有着相同编号的糖果,A袋中还剩下哪几种种类的糖果? 你能帮帮她吗?\n \u003cbr\u003e \n \u003cbr\u003e说不定你就获得了小晨学姐为你准备的礼物呢(*^_^*)~手速快者,能优先挑口味哟~\n\u003c/div\u003e"}},{"title":"Input","value":{"format":"HTML","content":" \u003cbr\u003e 每组输入数据占1行,每行数据的开始是2个整数n(0\u0026lt;\u003dn\u0026lt;\u003d100)和m(0\u0026lt;\u003dm\u0026lt;\u003d100),分别表示A和B的糖果种类个数,然后紧跟着n+m个糖果编号,前面n个糖果编号属于A,其余的属于B. \n \u003cbr\u003e \n \u003cbr\u003e 每个糖果编号为不超出int范围的整数,元素之间有一个空格隔开. \n \u003cbr\u003e \n\u003cbr\u003e如果n\u003d0并且m\u003d0表示输入的结束。"}},{"title":"Output","value":{"format":"HTML","content":" \u003cbr\u003e 每组数据输出一行数据,表示A-B的结果,如果结果为空,则输出“NULL”,否则从小到大输出结果。\n \u003cbr\u003e \n \u003cbr\u003e 注:每个元素后面跟一个空格. \n\u003cbr\u003e"}},{"title":"Sample Input","value":{"format":"HTML","content":"\u003cpre\u003e3 3 1 2 3 1 4 7\n3 7 2 5 8 2 3 4 5 6 7 8 \n0 0\u003c/pre\u003e"}},{"title":"Sample Output","value":{"format":"HTML","content":"\u003cpre\u003e2 3 \nNULL\u003c/pre\u003e"}},{"title":"","value":{"format":"HTML","content":""}}]}