{"trustable":true,"sections":[{"title":"","value":{"format":"HTML","content":"\u003cp\u003eA Benedict monk No.16 writes down the decimal representations of all natural numbers between and including \u003ci\u003em\u003c/i\u003e and \u003ci\u003en\u003c/i\u003e, \u003ci\u003em\u003c/i\u003e ≤ \u003ci\u003en\u003c/i\u003e. How many 0\u0027s will he write down? \u003c/p\u003e"}},{"title":"Input","value":{"format":"HTML","content":"\u003cp\u003eInput consists of a sequence of lines. Each line contains two unsigned 32-bit integers \u003ci\u003em\u003c/i\u003e and \u003ci\u003en\u003c/i\u003e, \u003ci\u003em\u003c/i\u003e ≤ \u003ci\u003en\u003c/i\u003e. The last line of input has the value of \u003ci\u003em\u003c/i\u003e negative and this line should not be processed. \u003c/p\u003e"}},{"title":"Output","value":{"format":"HTML","content":"\u003cp\u003eFor each line of input print one line of output with one integer number giving the number of 0\u0027s written down by the monk. \u003c/p\u003e"}},{"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\u003e10 11\r\n100 200\r\n0 500\r\n1234567890 2345678901\r\n0 4294967295\r\n-1 -1\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003e1\r\n22\r\n92\r\n987654304\r\n3825876150\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n"}}]}