{"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有n个硬币环形摆放,两人轮流取硬币,每次可以取 1 - k 个连续的硬币,你的任务是判断谁能胜出\n\u003cbr\u003e例如:10枚硬币编号从1到10 K等于3,因为1和10是连续的,你可以拿走连续的10 1 2,但是如果2被拿走了,你不能拿走1 3 4,因为1和3不是连续的。\n\u003cbr\u003e 谁先拿到最后一个硬币谁赢"}},{"title":"Input","value":{"format":"HTML","content":"\n第一行输入一个整数t(1\u0026lt;\u003dT\u0026lt;\u003d100),,代表有t组测试样例。每组测试样例输入两个整数n,k,代表有n个硬币,每次可以取k个。3\u0026lt;\u003dN\u0026lt;\u003d10\u003csup\u003e9\u003c/sup\u003e,1\u0026lt;\u003dK\u0026lt;\u003d10"}},{"title":"Output","value":{"format":"HTML","content":"对于每个案例,输出案例数和“first”或“second”的赢家。(如示例输出所示)"}},{"title":"Sample Input","value":{"format":"HTML","content":"\u003cpre\u003e2\n1 1\n3 2\u003c/pre\u003e"}},{"title":"Sample Output","value":{"format":"HTML","content":"\u003cpre\u003eCase 1: first\nCase 2: second\u003c/pre\u003e"}}]}