{"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\"\u003eRecall the definition of the Fibonacci numbers: \u003cbr\u003ef1 :\u003d 1 \u003cbr\u003ef2 :\u003d 2 \u003cbr\u003efn :\u003d fn-1 + fn-2 (n \u0026gt;\u003d 3) \u003cbr\u003e\u003cbr\u003eGiven two numbers a and b, calculate how many Fibonacci numbers are in the range [a, b]. \u003cbr\u003e\u003c/div\u003e"}},{"title":"Input","value":{"format":"HTML","content":"The input contains several test cases. Each test case consists of two non-negative integer numbers a and b. Input is terminated by a \u003d b \u003d 0. Otherwise, a \u0026lt;\u003d b \u0026lt;\u003d 10^100. The numbers a and b are given with no superfluous leading zeros.\u003cbr\u003e"}},{"title":"Output","value":{"format":"HTML","content":"For each test case output on a single line the number of Fibonacci numbers fi with a \u0026lt;\u003d fi \u0026lt;\u003d b. \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\u003e10 100\r\n1234567890 9876543210\r\n0 0\r\n\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003e5\r\n4\r\n\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n"}}]}