{"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$$\u0027]]\n }\n });\n\u003c/script\u003e\n\u003cscript type\u003d\"text/javascript\" async src\u003d\"https://mathjax.codeforces.org/MathJax.js?config\u003dTeX-AMS_HTML-full\"\u003e\u003c/script\u003e","sections":[{"title":"","value":{"format":"HTML","content":"\u003cp\u003eYou are given a permutation $$$a$$$ consisting of $$$n$$$ numbers $$$1$$$, $$$2$$$, ..., $$$n$$$ (a permutation is an array in which each element from $$$1$$$ to $$$n$$$ occurs exactly once).\u003c/p\u003e\u003cp\u003eYou can perform the following operation: choose some subarray (contiguous subsegment) of $$$a$$$ and rearrange the elements in it in any way you want. But this operation cannot be applied to the whole array.\u003c/p\u003e\u003cp\u003eFor example, if $$$a \u003d [2, 1, 4, 5, 3]$$$ and we want to apply the operation to the subarray $$$a[2, 4]$$$ (the subarray containing all elements from the $$$2$$$-nd to the $$$4$$$-th), then after the operation, the array can become $$$a \u003d [2, 5, 1, 4, 3]$$$ or, for example, $$$a \u003d [2, 1, 5, 4, 3]$$$.\u003c/p\u003e\u003cp\u003eYour task is to calculate the minimum number of operations described above to sort the permutation $$$a$$$ in ascending order.\u003c/p\u003e"}},{"title":"Input","value":{"format":"HTML","content":"\u003cp\u003eThe first line contains a single integer $$$t$$$ ($$$1 \\le t \\le 2000$$$)\u0026nbsp;— the number of test cases.\u003c/p\u003e\u003cp\u003eThe first line of the test case contains a single integer $$$n$$$ ($$$3 \\le n \\le 50$$$)\u0026nbsp;— the number of elements in the permutation.\u003c/p\u003e\u003cp\u003eThe second line of the test case contains $$$n$$$ distinct integers from $$$1$$$ to $$$n$$$\u0026nbsp;— the given permutation $$$a$$$.\u003c/p\u003e"}},{"title":"Output","value":{"format":"HTML","content":"\u003cp\u003eFor each test case, output a single integer\u0026nbsp;— the minimum number of operations described above to sort the array $$$a$$$ in ascending order.\u003c/p\u003e"}},{"title":"Examples","value":{"format":"HTML","content":"\u003ctable class\u003d\u0027vjudge_sample\u0027\u003e\n\u003cthead\u003e\n \u003ctr\u003e\n \u003cth\u003eInput\u003c/th\u003e\n \u003cth\u003eOutput\u003c/th\u003e\n \u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n \u003ctr\u003e\n \u003ctd\u003e\u003cpre\u003e3\n4\n1 3 2 4\n3\n1 2 3\n5\n2 1 4 5 3\n\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003e1\n0\n2\n\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n"}},{"title":"Note","value":{"format":"HTML","content":"\u003cp\u003eIn the explanations, $$$a[i, j]$$$ defines the subarray of $$$a$$$ that starts from the $$$i$$$-th element and ends with the $$$j$$$-th element.\u003c/p\u003e\u003cp\u003eIn the first test case of the example, you can select the subarray $$$a[2, 3]$$$ and swap the elements in it.\u003c/p\u003e\u003cp\u003eIn the second test case of the example, the permutation is already sorted, so you don\u0027t need to apply any operations.\u003c/p\u003e\u003cp\u003eIn the third test case of the example, you can select the subarray $$$a[3, 5]$$$ and reorder the elements in it so $$$a$$$ becomes $$$[2, 1, 3, 4, 5]$$$, and then select the subarray $$$a[1, 2]$$$ and swap the elements in it, so $$$a$$$ becomes $$$[1, 2, 3, 4, 5]$$$.\u003c/p\u003e"}}]}