{"trustable":true,"sections":[{"title":"","value":{"format":"MD","content":"Jimmy writes down the decimal representations of all natural numbers between and including **m** and **n, (m \u0026le; n)**. How many zeroes will he write down?"}},{"title":"Input","value":{"format":"MD","content":"Input starts with an integer **T (\u0026le; 11000)**, denoting the number of test cases.\n\nEach case contains two unsigned 32-bit integers **m** and **n, (m \u0026le; n)**."}},{"title":"Output","value":{"format":"MD","content":"For each case, print the case number and the number of zeroes written down by Jimmy."}},{"title":"Sample","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\u003e5\n10 11\n100 200\n0 500\n1234567890 2345678901\n0 4294967295\n\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003eCase 1: 1\nCase 2: 22\nCase 3: 92\nCase 4: 987654304\nCase 5: 3825876150\n\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n"}}]}