{"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":"\u003ca href\u003d\"https://sm.ms/image/f4HxU8cTEgIrX12\" target\u003d\"_blank\"\u003e\u003cimg src\u003d\"https://i.loli.net/2019/10/26/f4HxU8cTEgIrX12.png\" \u003e\u003c/a\u003e"}},{"title":"Sample Input","value":{"format":"HTML","content":"\u003cpre\u003e12 16\n2 2 2 2 2 2 2 2 2 2 2 2 \n1 3\n3 2\n2 1\n3 4\n2 4\n3 5\n5 4\n4 6\n6 4\n7 4\n7 12\n7 8\n8 7\n8 9\n10 9\n11 10\u003c/pre\u003e"}},{"title":"Sample Output","value":{"format":"HTML","content":"\u003cpre\u003e3 6\u003c/pre\u003e"}}]}