{"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":"在剑三生死存亡之际,剑三主策划gww又又又又又又出道了,剑三er们又开始了为gww打榜的生活,你现在可以买V个应援物,打榜的应援物有N种,每种的价格和数量都不一样。请问你最多能购买多少应援物(应援物可无限分割)"}},{"title":"Input","value":{"format":"HTML","content":"输入包含多个测试实例,第一行包含两个整数V和N(V,N\u0026lt;100),分别表示你可以买的应援物数量和应援物的种类,接着的N行每行包含2个整数pi和mi(0\u0026lt;pi,mi\u0026lt;10),分别表示某种应援物每个的单价和对应的个数,V为0的时候结束输入。 "}},{"title":"Output","value":{"format":"HTML","content":"对于每个测试实例,请输出最多能拿到多少价值的应援物,每个实例的输出占一行。 \n\u003cbr\u003e"}},{"title":"Sample Input","value":{"format":"HTML","content":"\u003cpre\u003e2 2\n3 1\n2 3\n0\u003c/pre\u003e"}},{"title":"Sample Output","value":{"format":"HTML","content":"\u003cpre\u003e5\n\n\n\u003c/pre\u003e"}}]}