{"trustable":false,"prependHtml":"\u003cstyle type\u003d\"text/css\"\u003e\n #problem-body \u003e pre {\n display: block;\n padding: 9.5px;\n margin: 0 0 10px;\n font-size: 13px;\n line-height: 1.42857143;\n word-break: break-all;\n word-wrap: break-word;\n color: #333;\n background: rgba(255, 255, 255, 0.5);\n border: 1px solid #ccc;\n border-radius: 6px;\n }\n\u003c/style\u003e\n","sections":[{"title":"Description","value":{"format":"MD","content":"求给定区间,一个数的数位上每个奇数出现偶数次,每个偶数出现奇数次,这样数的个数"}},{"title":"Input","value":{"format":"MD","content":"第一行包含一个整数t,表示数据组数。\n接下来t行,每行两个整数A,B(1 \u0026le; A \u0026le; B \u0026le; 10\u003csup\u003e19\u003c/sup\u003e)。"}},{"title":"Output","value":{"format":"MD","content":"共t行,每行一个整数,即所求答案。"}},{"title":"Sample Input","value":{"format":"MD","content":"```\n2\n1 1000\n1 9\n```\n"}},{"title":"Sample Output","value":{"format":"MD","content":"```\n147\n4\n```"}}]}