{"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$$\u0027]]\n }\n });\n\u003c/script\u003e\n\u003cscript type\u003d\"text/javascript\" async src\u003d\"https://mathjax.codeforces.org/MathJax.js?config\u003dTeX-AMS_HTML-full\"\u003e\u003c/script\u003e","sections":[{"title":"","value":{"format":"HTML","content":"\u003cp\u003e我们称一个整数是 \u003cspan class\u003d\"tex-font-style-it\"\u003eclassy\u003c/span\u003e 的,当且仅当这个数字拥有不超过 $$$3$$$ 个非零数位。例如,整数 $$$4$$$, $$$200000$$$, $$$10203$$$ 是 \u003cspan class\u003d\"tex-font-style-it\"\u003eclassy\u003c/span\u003e 的,但 $$$4231$$$, $$$102306$$$, $$$7277420000$$$ 不是。\u003c/p\u003e\u003cp\u003e给定区间 $$$[L; R]$$$ ,统计存在多少 \u003cspan class\u003d\"tex-font-style-it\"\u003eclassy\u003c/span\u003e 的整数 $$$x$$$ 满足 $$$L \\le x \\le R$$$ 。\u003c/p\u003e\u003cp\u003e多测。\u003c/p\u003e"}},{"title":"Input","value":{"format":"HTML","content":"\u003cp\u003eThe first line contains a single integer $$$T$$$ ($$$1 \\le T \\le 10^4$$$) — the number of segments in a testcase.\u003c/p\u003e\u003cp\u003eEach of the next $$$T$$$ lines contains two integers $$$L_i$$$ and $$$R_i$$$ ($$$1 \\le L_i \\le R_i \\le 10^{18}$$$).\u003c/p\u003e"}},{"title":"Output","value":{"format":"HTML","content":"\u003cp\u003ePrint $$$T$$$ lines — the $$$i$$$-th line should contain the number of \u003cspan class\u003d\"tex-font-style-it\"\u003eclassy\u003c/span\u003e integers on a segment $$$[L_i; R_i]$$$.\u003c/p\u003e"}},{"title":"Sample 1","value":{"format":"HTML","content":"\u003ctable class\u003d\u0027vjudge_sample\u0027\u003e\n\u003cthead\u003e\n \u003ctr\u003e\n \u003cth\u003eInput\u003c/th\u003e\n \u003cth\u003eOutput\u003c/th\u003e\n \u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n \u003ctr\u003e\n \u003ctd\u003e\u003cpre\u003e4\n1 1000\n1024 1024\n65536 65536\n999999 1000001\n\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003e1000\n1\n0\n2\n\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n"}}]}