{"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":"\n给定一个长度为N的序列,序列中的元素都不相同,有多少个下标三元组(i<j<k)满足A[i]<A[j]<A[k]或者A[i]>A[j]>A[k];"}},{"title":"Input","value":{"format":"HTML","content":"\n第一行一个整数n,表示测试数据组数。\u003c/br\u003e\n每组测试数据,第一行一个整数n,表示序列长度。\u003c/br\u003e\n接下来一行n个不同的数。"}},{"title":"Output","value":{"format":"HTML","content":"\n输出满足条件的三元组数量"}},{"title":"Sample Input","value":{"format":"HTML","content":"\u003cpre\u003e1\n3 1 2 3\u003c/pre\u003e"}},{"title":"Sample Output","value":{"format":"HTML","content":"\u003cpre\u003e1\u003c/pre\u003e"}}]}