{"trustable":false,"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":"\u003cscript type\u003d\u0027text/x-mathjax-config\u0027\u003eMathJax.Hub.Config({tex2jax: { inlineMath: [[\u0027$\u0027,\u0027$\u0027]] } }); \u003c/script\u003e\n\u003cscript type\u003d\u0027text/javascript\u0027 src\u003d\u0027https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config\u003dTeX-AMS-MML_HTMLorMML\u0027\u003e\u003c/script\u003e\n\u003cscript type\u003d\u0027text/javascript\u0027\u003esetTimeout(function(){MathJax.Hub.Queue([\u0027Typeset\u0027, MathJax.Hub, \u0027left_view\u0027]);}, 2000);\u003c/script\u003e\n\u003cdiv class\u003d\"panel_content\"\u003e\n Your objective for this question is to develop a program which will generate a fibbonacci number. The fibbonacci function is defined as such: \n \u003cbr\u003e \n \u003cbr\u003e f(0) \u003d 0 \n \u003cbr\u003e f(1) \u003d 1 \n \u003cbr\u003e f(n) \u003d f(n-1) + f(n-2) \n \u003cbr\u003e \n \u003cbr\u003eYour program should be able to handle values of n in the range 0 to 50. \n \u003cbr\u003e \n\u003c/div\u003e"}},{"title":"Input","value":{"format":"HTML","content":"Each test case consists of one integer n in a single line where 0≤n≤50. The input is terminated by -1."}},{"title":"Output","value":{"format":"HTML","content":"Print out the answer in a single line for each test case."}},{"title":"Sample Input","value":{"format":"HTML","content":"\u003cpre\u003e3\n4\n5\n-1\u003c/pre\u003e"}},{"title":"Sample Output","value":{"format":"HTML","content":"\u003cpre\u003e2\n3\n5\n\n\n \n \u003ci style\u003d\"font-size:1px\"\u003e \u003c/i\u003e\nyou can use 64bit integer: __int64\u003c/pre\u003e"}},{"title":"Hint","value":{"format":"HTML","content":"\u003cstrong\u003eNote:\n 注意数字太大可能超过 int 表示范围\n \u003c/strong\u003e"}}]}