{"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":"今天中午,Zzn学长非常郁闷。\n昨晚睡得太晚了,中午才睡醒了。但是好饿呀!!!Z想让S学长带份饭。S怎么会那么容易放过他,正好S的老师给布置了一道作业:\n给一个函数f(m) \u003d m * m + m + 41(m取整数),当m满足x \u003c\u003d m \u003c\u003d y时,判断f(m)是否都为素数。聪明的参赛者们能帮一帮Zzn学长吗?"}},{"title":"Input","value":{"format":"HTML","content":"输入数据有多组,每组占一行,由两个整数x,y组成,当x\u003d0,y\u003d0时,表示输入结束,该行不做处理。(-39 \u003c\u003d x \u003c\u003d y \u003c\u003d 50)"}},{"title":"Output","value":{"format":"HTML","content":"对于每个给定范围内的取值,如果函数值都为素数,则输出\"OK\",否则请输出“Sorry”,每组输出占一行。 \n\u003cbr\u003e"}},{"title":"Sample Input","value":{"format":"HTML","content":"\u003cpre\u003e0 1\n0 0\u003c/pre\u003e"}},{"title":"Sample Output","value":{"format":"HTML","content":"\u003cpre\u003eOK\u003c/pre\u003e"}}]}