{"trustable":true,"sections":[{"title":"Description","value":{"format":"MD","content":"Output all non-repetitive permutations of natural numbers from $1$ to $n$ in lexicographical order, i.e., full permutations of $n$, with the requirement that no duplicate digits are allowed in any generated number sequence."}},{"title":"Input","value":{"format":"MD","content":"An integer $n$."}},{"title":"Output","value":{"format":"MD","content":"All non-repetitive number sequences composed of $1 \\sim n$, with each sequence printed on a separate line.\n\nEach number should be displayed with a field width of $5$."}},{"title":"Sample 1","value":{"format":"MD","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\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003e 1 2 3\n 1 3 2\n 2 1 3\n 2 3 1\n 3 1 2\n 3 2 1\n\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e"}},{"title":"Hint","value":{"format":"MD","content":"$1 \\leq n \\leq 9$."}}]}