{"trustable":true,"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$$\u0027]]\n }\n });\n\u003c/script\u003e\n\u003cscript type\u003d\"text/javascript\" async src\u003d\"https://mathjax.codeforces.org/MathJax.js?config\u003dTeX-AMS_HTML-full\"\u003e\u003c/script\u003e","sections":[{"title":"","value":{"format":"HTML","content":"\u003cp\u003eMaxim wants to buy some games at the local game shop. There are $$$n$$$ games in the shop, the $$$i$$$-th game costs $$$c_i$$$.\u003c/p\u003e\u003cp\u003eMaxim has a wallet which can be represented as an array of integers. His wallet contains $$$m$$$ bills, the $$$j$$$-th bill has value $$$a_j$$$.\u003c/p\u003e\u003cp\u003eGames in the shop are ordered from left to right, Maxim tries to buy \u003cspan class\u003d\"tex-font-style-it\"\u003eevery\u003c/span\u003e game in that order.\u003c/p\u003e\u003cp\u003eWhen Maxim stands at the position $$$i$$$ in the shop, he takes the first bill from his wallet (if his wallet is empty then he proceeds to the next position immediately) and tries to buy the $$$i$$$-th game using this bill. After Maxim tried to buy the $$$n$$$-th game, he leaves the shop.\u003c/p\u003e\u003cp\u003eMaxim buys the $$$i$$$-th game if and only if the value of the first bill (which he takes) from his wallet is greater or equal to the cost of the $$$i$$$-th game. If he successfully buys the $$$i$$$-th game, the first bill from his wallet disappears and the next bill becomes first. Otherwise Maxim leaves the first bill in his wallet \u003cspan class\u003d\"tex-font-style-bf\"\u003e(this bill still remains the first one)\u003c/span\u003e and proceeds to the next game.\u003c/p\u003e\u003cp\u003eFor example, for array $$$c \u003d [2, 4, 5, 2, 4]$$$ and array $$$a \u003d [5, 3, 4, 6]$$$ the following process takes place: Maxim buys the first game using the first bill (its value is $$$5$$$), the bill disappears, after that the second bill (with value $$$3$$$) becomes the first one in Maxim\u0027s wallet, then Maxim doesn\u0027t buy the second game because $$$c_2 \u0026gt; a_2$$$, the same with the third game, then he buys the fourth game using the bill of value $$$a_2$$$ (the third bill becomes the first one in Maxim\u0027s wallet) and buys the fifth game using the bill of value $$$a_3$$$.\u003c/p\u003e\u003cp\u003eYour task is to get the number of games Maxim will buy.\u003c/p\u003e"}},{"title":"Input","value":{"format":"HTML","content":"\u003cp\u003eThe first line of the input contains two integers $$$n$$$ and $$$m$$$ ($$$1 \\le n, m \\le 1000$$$) — the number of games and the number of bills in Maxim\u0027s wallet.\u003c/p\u003e\u003cp\u003eThe second line of the input contains $$$n$$$ integers $$$c_1, c_2, \\dots, c_n$$$ ($$$1 \\le c_i \\le 1000$$$), where $$$c_i$$$ is the cost of the $$$i$$$-th game.\u003c/p\u003e\u003cp\u003eThe third line of the input contains $$$m$$$ integers $$$a_1, a_2, \\dots, a_m$$$ ($$$1 \\le a_j \\le 1000$$$), where $$$a_j$$$ is the value of the $$$j$$$-th bill from the Maxim\u0027s wallet.\u003c/p\u003e"}},{"title":"Output","value":{"format":"HTML","content":"\u003cp\u003ePrint a single integer — the number of games Maxim will buy.\u003c/p\u003e"}},{"title":"Examples","value":{"format":"HTML","content":"\u003ctable class\u003d\u0027vjudge_sample\u0027\u003e\n\u003cthead\u003e\n \u003ctr\u003e\n \u003cth\u003eInput\u003c/th\u003e\n \u003cth\u003eOutput\u003c/th\u003e\n \u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n \u003ctr\u003e\n \u003ctd\u003e\u003cpre\u003e5 4\n2 4 5 2 4\n5 3 4 6\n\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003e3\n\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n"}},{"title":"","value":{"format":"HTML","content":"\u003ctable class\u003d\u0027vjudge_sample\u0027\u003e\n\u003cthead\u003e\n \u003ctr\u003e\n \u003cth\u003eInput\u003c/th\u003e\n \u003cth\u003eOutput\u003c/th\u003e\n \u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n \u003ctr\u003e\n \u003ctd\u003e\u003cpre\u003e5 2\n20 40 50 20 40\n19 20\n\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003e0\n\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n"}},{"title":"","value":{"format":"HTML","content":"\u003ctable class\u003d\u0027vjudge_sample\u0027\u003e\n\u003cthead\u003e\n \u003ctr\u003e\n \u003cth\u003eInput\u003c/th\u003e\n \u003cth\u003eOutput\u003c/th\u003e\n \u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n \u003ctr\u003e\n \u003ctd\u003e\u003cpre\u003e6 4\n4 8 15 16 23 42\n1000 1000 1000 1000\n\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003e4\n\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n"}},{"title":"Note","value":{"format":"HTML","content":"\u003cp\u003eThe first example is described in the problem statement.\u003c/p\u003e\u003cp\u003eIn the second example Maxim cannot buy any game because the value of the first bill in his wallet is smaller than the cost of any game in the shop.\u003c/p\u003e\u003cp\u003eIn the third example the values of the bills in Maxim\u0027s wallet are large enough to buy any game he encounter until he runs out of bills in his wallet.\u003c/p\u003e"}}]}