{"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":"\u003cdiv\u003e\nCyberdebut因为过度的放♂纵自己,终于把他的肾玩坏了。\u003c/br\u003e他需要去看很多医生,而且按照医生1,医生2,医生3……的顺序去找一个医生一整天。可是医生也需要休息,第i个医生总是在第si天开始工作,并且每隔di天工作一次(工作时间为si,si+di,si+2*di……)。\u003c/br\u003e\n请你帮Cyberdebut计算他需要多少时间才能看完所有医生\n\u003c/div\u003e"}},{"title":"Input","value":{"format":"HTML","content":"第一行包含一个整数n(1\u003c\u003dn\u003c\u003d1000)\u003c/br\u003e\n接下来的n行,每行包含两个整数si和di(1\u003c\u003dsi,di\u003c\u003d1000)."}},{"title":"Output","value":{"format":"HTML","content":"输出一个整数,Cyberdebut需要的最短时间。"}},{"title":"Example","value":{"format":"HTML","content":"\u003cstyle type\u003d\u0027text/css\u0027\u003e .input, .output {border: 1px solid #888888;} .output {margin-bottom:1em;position:relative;top:-1px;} .output pre,.input pre {background-color:#EFEFEF;line-height:1.25em;margin:0;padding:0.25em;} .title {background-color:#FFFFFF;border-bottom: 1px solid #888888;font-family:arial;font-weight:bold;padding:0.25em;} \u003c/style\u003e\u003cdiv class\u003d\"sample-tests\"\u003e\n \u003cdiv class\u003d\"section-title\"/div\u003e\n \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\u003e3\u003cbr\u003e2 2\u003cbr\u003e1 2\u003cbr\u003e2 2\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\u003e4\u003cbr\u003e\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\u003e2\u003cbr\u003e10 1\u003cbr\u003e6 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\u003e11\u003cbr\u003e\u003c/pre\u003e\n \u003c/div\u003e\n \u003c/div\u003e\n\u003c/div\u003e"}},{"title":"Note","value":{"format":"HTML","content":"\u003cdiv class\u003d\"note\"\u003e\n \u003cdiv class\u003d\"section-title\"Note/div\u003e\n \u003cp\u003eIn the first sample case, Cyberdebut can visit all doctors on days \u003cspan class\u003d\"tex-span\"\u003e2\u003c/span\u003e, \u003cspan class\u003d\"tex-span\"\u003e3\u003c/span\u003e and \u003cspan class\u003d\"tex-span\"\u003e4\u003c/span\u003e.\u003c/p\u003e\n \u003cp\u003eIn the second sample case, Cyberdebut can visit all doctors on days \u003cspan class\u003d\"tex-span\"\u003e10\u003c/span\u003e and \u003cspan class\u003d\"tex-span\"\u003e11\u003c/span\u003e.\u003c/p\u003e\n\u003c/div\u003e"}}]}