{"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":"MD","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 孤单的zydsg又一次孤单的度过了520,不过下一次不会再这样了。zydsg要做些改变,他开始尝试和与他有GCD缘分的小姐姐约会。 \n \u003cbr\u003e已知zydsg的编号为整数N,小姐姐们的编号为小于N的正整数,编号为M (0\u0026lt;M\u0026lt;N)的小姐姐如果满足 GCD(N,M)\u0026gt;1.则称为和zydsg是有GCD缘分的。 \n \u003cbr\u003e 请问你能帮忙计算有多少小姐姐和zydsg有GCD缘分吗?\n\u003c/div\u003e"}},{"title":"Input","value":{"format":"MD","content":"多组数据。每组为一个正整数N (1\u0026lt;N\u0026lt;100000000)。 最后一行为0代表输入结束。\n\u003cbr\u003e"}},{"title":"Output","value":{"format":"MD","content":"对每个N,输入当zydsg编号为N时和他有缘的小姐姐的个数\n\u003cbr\u003e"}},{"title":"Sample Input","value":{"format":"MD","content":"\u003cpre\u003e2\n4\n0\u003c/pre\u003e"}},{"title":"Sample Output","value":{"format":"MD","content":"\u003cpre\u003e0\n1\u003c/pre\u003e"}}]}