{"trustable":true,"prependHtml":"\u003cstyle type\u003d\u0027text/css\u0027\u003e\n .input, .output {\n border: 1px solid #888888;\n }\n .output {\n margin-bottom: 1em;\n position: relative;\n top: -1px;\n }\n .output pre, .input pre {\n background-color: #EFEFEF;\n line-height: 1.25em;\n margin: 0;\n padding: 0.25em;\n }\n \u003c/style\u003e\n \u003clink rel\u003d\"stylesheet\" href\u003d\"//codeforces.org/s/96598/css/problem-statement.css\" type\u003d\"text/css\" /\u003e\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$$\u0027]]\n }\n });\n\u003c/script\u003e\n\u003cscript type\u003d\"text/javascript\" async src\u003d\"https://mathjax.codeforces.org/MathJax.js?config\u003dTeX-AMS_HTML-full\"\u003e\u003c/script\u003e","sections":[{"title":"","value":{"format":"HTML","content":"\u003cp\u003e给定$$$n$$$个正整数$$$a_1, \\ldots, a_n$$$和一个整数$$$k \\geq 2$$$。计算满足$$$1 \\leq i \u0026lt; j \\leq n$$$条件的配对$$$i, j$$$的数量,其中存在一个整数$$$x$$$使得$$$a_i \\cdot a_j \u003d x^k$$$。\u003c/p\u003e"}},{"title":"输入","value":{"format":"HTML","content":"\u003cp\u003e第一行包含两个整数$$$n$$$和$$$k$$$($$$2 \\leq n \\leq 10^5$$$,$$$2 \\leq k \\leq 100$$$)。\u003c/p\u003e\u003cp\u003e第二行包含$$$n$$$个整数$$$a_1, \\ldots, a_n$$$($$$1 \\leq a_i \\leq 10^5$$$)。\u003c/p\u003e"}},{"title":"输出","value":{"format":"HTML","content":"\u003cp\u003e输出一个整数,表示合适配对的数量。\u003c/p\u003e"}},{"title":"示例 1","value":{"format":"HTML","content":"\u003ctable class\u003d\u0027vjudge_sample\u0027\u003e\n\u003cthead\u003e\n \u003ctr\u003e\n \u003cth\u003eInput\u003c/th\u003e\n \u003cth\u003eOutput\u003c/th\u003e\n \u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n \u003ctr\u003e\n \u003ctd\u003e\u003cpre\u003e6 3\n1 3 9 8 24 1\n\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003e5\n\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e"}},{"title":"注意","value":{"format":"HTML","content":"\u003cp\u003e在示例中,合适的配对有:\u003c/p\u003e\u003cul\u003e\u003cli\u003e $$$a_1 \\cdot a_4 \u003d 8 \u003d 2^3$$$;\u003c/li\u003e\u003cli\u003e $$$a_1 \\cdot a_6 \u003d 1 \u003d 1^3$$$;\u003c/li\u003e\u003cli\u003e $$$a_2 \\cdot a_3 \u003d 27 \u003d 3^3$$$;\u003c/li\u003e\u003cli\u003e $$$a_3 \\cdot a_5 \u003d 216 \u003d 6^3$$$;\u003c/li\u003e\u003cli\u003e $$$a_4 \\cdot a_6 \u003d 8 \u003d 2^3$$$。\u003c/li\u003e\u003c/ul\u003e"}}]}