{"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":"LYD想构造一个由n个正整数组成的数组a。然后他给了你m个区间[l,r],对每个区间而言,要求在子序列al~ar中每个数都是唯一的。他想得到满足他上述要求且字典序最小的数组,你能帮帮他吗。\n"}},{"title":"Input","value":{"format":"MD","content":"多组数据,第一行一个整数T表示数据组数。\n每组数据第一行包含2个整数n,m(1\u003c\u003dn,m\u003c\u003d1e5)。\n以下m行每行2个整数li,ri,1\u003c\u003dli,ri\u003c\u003dn。"}},{"title":"Output","value":{"format":"MD","content":"对每组数据,输出一行n个数,每两个数之间用空格隔开,注意:行末不留多余空格。"}},{"title":"Sample Input","value":{"format":"MD","content":"3\n4 2\n1 2\n3 4\n2 1\n1 2\n5 2\n1 3\n2 4"}},{"title":"Sample Output","value":{"format":"MD","content":"1 2 1 2\n1 2\n1 2 3 1 1"}}]}