{"trustable":true,"prependHtml":"\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 async src\u003d\"https://mathjax.codeforces.org/MathJax.js?config\u003dTeX-AMS-MML_HTMLorMML\" type\u003d\"text/javascript\"\u003e\u003c/script\u003e","sections":[{"title":"","value":{"format":"HTML","content":"\u003cdiv class\u003d\"panel_content\"\u003eA weird clock marked from 0 to 59 has only a minute hand. It won\u0027t move until a special coin is thrown into its box. There are different kinds of coins as your options. However once you make your choice, you cannot use any other kind. There are infinite number of coins of each kind, each marked with a number d ( 1 \u0026lt;\u003d d \u0026lt;\u003d 1000 ), meaning that this coin will make the minute hand move d times clockwise the current time. For example, if the current time is 45, and d \u003d 2. Then the minute hand will move clockwise 90 minutes and will be pointing to 15.\u003cbr\u003e\u003cbr\u003eNow you are given the initial time s ( 1 \u0026lt;\u003d s \u0026lt;\u003d 59 ) and the coin\u0027s type d. Write a program to find the minimum number of d-coins needed to turn the minute hand back to 0.\u003cbr\u003e\u003c/div\u003e"}},{"title":"Input","value":{"format":"HTML","content":"There are several tests. Each test occupies a line containing two positive integers s and d.\u003cbr\u003e\u003cbr\u003eThe input is finished by a line containing 0 0.\u003cbr\u003e"}},{"title":"Output","value":{"format":"HTML","content":"For each test print in a single line the minimum number of coins needed. If it is impossible to turn the hand back to 0, output \"Impossible\".\u003cbr\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\u003e30 1\r\n0 0\r\n\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003e1\r\n\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n"}}]}