{"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":"MD","content":"\u003cp\u003e X++\u003cspan\u003e是一种非常简单的编程语言,它只有两种操作\u003c/span\u003e\u003c/p\u003e \n\u003cul\u003e \n \u003cli\u003e \u003cspan\u003e++\u003cspan\u003e操作:X的值加1\u003c/span\u003e\u003c/span\u003e\u003c/li\u003e \n \u003cli\u003e \u003cspan\u003e-- 操作:\u003c/span\u003e\u0026nbsp;\u003cspan\u003eX的值减1\u003c/span\u003e\u003c/li\u003e \n\u003c/ul\u003e \n\u003cp\u003e \u0026nbsp;X++ 语言是一种序列语言,仅由若干个单独的语句构成, \u003cspan\u003e语句只含有一种操作和一个变量X\u003c/span\u003e. \u003cspan\u003e语句不含空格,只有\u003c/span\u003e \"\u003cspan\u003e+\u003c/span\u003e\", \"\u003cspan\u003e-\u003c/span\u003e\", \"\u003cspan\u003eX\u003c/span\u003e\"\u003cspan\u003e这三种字符\u003c/span\u003e.\u003c/p\u003e \n\u003cp\u003e \u003cspan\u003e语句之间仅用换行符隔开,不含其他字符\u003c/span\u003e\u003c/p\u003e \n\u003cp\u003e \u003cspan\u003e现在给你一段X\u003c/span\u003e++语言源代码,X的初始值为0,求出程序运行结束后,X的值为多少。\u003c/p\u003e"}},{"title":"Input","value":{"format":"MD","content":"第一行一个正整数\u003c/span\u003e\u0026nbsp;\u003cspan\u003e\u003ci\u003en\u003c/i\u003e\u003c/span\u003e \u003cspan\u003e(1 ≤ \u003ci\u003en\u003c/i\u003e ≤ 150)\u003c/span\u003e — \u003cspan\u003e该源程序的语句数量\u003c/span\u003e\u003c/p\u003e \n \u003cp\u003e \u003cspan\u003e接下来n行,每行一个字符串,表示X\u003c/span\u003e++语言的一个语句。请注意:操作可以放在变量的前面和后面,效果是一样的(类似于C语言)"}},{"title":"Output","value":{"format":"MD","content":"\u003cdiv\u003e \n \u003cdiv\u003e \n \u003cp\u003e \u003cspan\u003e输出X在程序运行结束后的值\u003c/span\u003e\u003c/p\u003e \n \u003c/div\u003e \n\u003c/div\u003e"}},{"title":"Sample Input1","value":{"format":"MD","content":"1\n++X"}},{"title":"Sample Output1","value":{"format":"MD","content":"1"}},{"title":"Sample Input2","value":{"format":"MD","content":"2\nX++\n--X\n"}},{"title":"Sample Output2","value":{"format":"MD","content":"0\n"}}]}