{"trustable":false,"prependHtml":"\u003cstyle type\u003d\u0027text/css\u0027\u003e\n .input, .output {\n border: 1px solid #888888;\n }\n .output {\n margin-bottom: 1em;\n position: relative;\n top: -1px;\n }\n .output pre, .input pre {\n background-color: #EFEFEF;\n line-height: 1.25em;\n margin: 0;\n padding: 0.25em;\n }\n \u003c/style\u003e\n \u003clink rel\u003d\"stylesheet\" href\u003d\"//codeforces.org/s/96598/css/problem-statement.css\" type\u003d\"text/css\" /\u003e\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 type\u003d\"text/javascript\" async src\u003d\"https://mathjax.codeforces.org/MathJax.js?config\u003dTeX-AMS_HTML-full\"\u003e\u003c/script\u003e","sections":[{"title":"","value":{"format":"HTML","content":"\u003cp\u003e定义如果一个数被称为x数,则这个数的偶数位上为数字x,奇数位上不能出现数字x(0\u0026lt;\u003dx\u0026lt;\u003d9)。\u003c/p\u003e\n\u003cp\u003e求对于一个区间[a,b]里面可以被m整除的x数有多少个。\u003c/p\u003e\n"}},{"title":"Input","value":{"format":"HTML","content":"\u003cp\u003e第一行包含整数m和x(1\u0026lt;\u003dm\u0026lt;\u003d2000; 0\u0026lt;\u003dx\u0026lt;\u003d9)。\u003c/p\u003e\n\u003cp\u003e第二行包含正整数a,第三行包含正整数b。a和b由十进制表示且没有前导零。\u003c/p\u003e\n\u003cp\u003e保证a\u0026lt;\u003db,a和b位数相同且不超过2000。\u003c/p\u003e\n"}},{"title":"Output","value":{"format":"HTML","content":"输出将答案取模10\u003csup\u003e9\u003c/sup\u003e+7的结果,即区间[a,b]中是m的倍数且为x数的数量。"}},{"title":"Examples","value":{"format":"HTML","content":"\u003cdiv class\u003d\"sample-test\"\u003e\n \u003cdiv class\u003d\"input\"\u003e\n \u003cdiv class\u003d\"title\"\u003e\n Input\n \u003c/div\u003e\n \u003cpre\u003e2 6\u003cbr\u003e10\u003cbr\u003e99\u003cbr\u003e\u003c/pre\u003e\n \u003c/div\u003e\n \u003cdiv class\u003d\"output\"\u003e\n \u003cdiv class\u003d\"title\"\u003e\n Output\n \u003c/div\u003e\n \u003cpre\u003e8\u003cbr\u003e\u003c/pre\u003e\n \u003c/div\u003e\n \u003cdiv class\u003d\"input\"\u003e\n \u003cdiv class\u003d\"title\"\u003e\n Input\n \u003c/div\u003e\n \u003cpre\u003e2 0\u003cbr\u003e1\u003cbr\u003e9\u003cbr\u003e\u003c/pre\u003e\n \u003c/div\u003e\n \u003cdiv class\u003d\"output\"\u003e\n \u003cdiv class\u003d\"title\"\u003e\n Output\n \u003c/div\u003e\n \u003cpre\u003e4\u003cbr\u003e\u003c/pre\u003e\n \u003c/div\u003e\n \u003cdiv class\u003d\"input\"\u003e\n \u003cdiv class\u003d\"title\"\u003e\n Input\n \u003c/div\u003e\n \u003cpre\u003e19 7\u003cbr\u003e1000\u003cbr\u003e9999\u003cbr\u003e\u003c/pre\u003e\n \u003c/div\u003e\n \u003cdiv class\u003d\"output\"\u003e\n \u003cdiv class\u003d\"title\"\u003e\n Output\n \u003c/div\u003e\n \u003cpre\u003e6\u003cbr\u003e\u003c/pre\u003e\n \u003c/div\u003e\n\u003c/div\u003e"}},{"title":"Note","value":{"format":"HTML","content":"\u003cp\u003e第一个样例,满足条件的数包括16,26,36,46,56,76,86,96\u003c/p\u003e\n\u003cp\u003e第二个样例,满足条件的数包括2,4,6,8\u003c/p\u003e\n"}}]}