{"trustable":false,"prependHtml":"\u003cstyle type\u003d\u0027text/css\u0027\u003e\n .input, .output {\n border: 1px solid #888888;\n }\n .output {\n margin-bottom: 1em;\n position: relative;\n top: -1px;\n }\n .output pre, .input pre {\n background-color: #EFEFEF;\n line-height: 1.25em;\n margin: 0;\n padding: 0.25em;\n }\n \u003c/style\u003e\n \u003clink rel\u003d\"stylesheet\" href\u003d\"//codeforces.org/s/96598/css/problem-statement.css\" type\u003d\"text/css\" /\u003e\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 type\u003d\"text/javascript\" async src\u003d\"https://mathjax.codeforces.org/MathJax.js?config\u003dTeX-AMS_HTML-full\"\u003e\u003c/script\u003e","sections":[{"title":"","value":{"format":"HTML","content":"小A在一家商店做兼职,在做兼职的这n天里,第i天会有ki件商品进行售卖,并且会有Li个顾客光临,每个顾客都只会买一件商品,并且商品如果当天没有卖掉,就不会继续放在货架上出售。商店老板有个想法:在n天中,让小A选择任意的f天,这f天内每天进行售卖的商品数量能变成原来的2倍。问小A应该如何选择这f天,使得成功出售的商品数量最多,输出最大的销售量。"}},{"title":"Input","value":{"format":"HTML","content":"第一行包含两个整数n,f(1\u003c\u003dn\u003c\u003d10^5,0\u003c\u003df\u003c\u003dn),代表共有n天,并且小A可以选择f天。\u003cp\u003e\n接下来有n行,每行两个整数ki,Li(0\u003c\u003dki,Li\u003c\u003d10^9),代表这一天有ki件商品,并有Li个顾客光临。"}},{"title":"Output","value":{"format":"HTML","content":"输出最大的销售量"}},{"title":"Examples","value":{"format":"HTML","content":"\u003cdiv class\u003d\"sample-test\"\u003e\n \u003cdiv class\u003d\"input\"\u003e\n \u003cdiv class\u003d\"title\"\u003e\n Input\n \u003c/div\u003e\n \u003cpre\u003e4 2\u003cbr\u003e2 1\u003cbr\u003e3 5\u003cbr\u003e2 3\u003cbr\u003e1 5\u003cbr\u003e\u003c/pre\u003e\n \u003c/div\u003e\n \u003cdiv class\u003d\"output\"\u003e\n \u003cdiv class\u003d\"title\"\u003e\n Output\n \u003c/div\u003e\n \u003cpre\u003e10\u003c/pre\u003e\n \u003c/div\u003e\n \u003cdiv class\u003d\"input\"\u003e\n \u003cdiv class\u003d\"title\"\u003e\n Input\n \u003c/div\u003e\n \u003cpre\u003e4 1\u003cbr\u003e0 2\u003cbr\u003e0 3\u003cbr\u003e3 5\u003cbr\u003e0 6\u003cbr\u003e\u003c/pre\u003e\n \u003c/div\u003e\n \u003cdiv class\u003d\"output\"\u003e\n \u003cdiv class\u003d\"title\"\u003e\n Output\n \u003c/div\u003e\n \u003cpre\u003e5\u003c/pre\u003e\n \u003c/div\u003e\n\u003c/div\u003e"}},{"title":"Note","value":{"format":"HTML","content":"第一个例子 小A可以选择第2天和第4天,那么这4天的进行售卖的商品为[2,6,2,2],而这4天顾客的个数为[1,5,3,5],那么销售量就等于1+5+2+2\u003d10\u003cp\u003e\n第二个例子 小A可以选择第三天,销售量为5"}}]}