{"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\u003eThe classic programming language of Bitland is Bit++. This language is so peculiar and complicated.\u003c/p\u003e\u003cp\u003eThe language is that peculiar as it has exactly one variable, called \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ex\u003c/i\u003e\u003c/span\u003e. Also, there are two operations:\u003c/p\u003e\u003cul\u003e \u003cli\u003e Operation \u003cspan class\u003d\"tex-font-style-tt\"\u003e++\u003c/span\u003e increases the value of variable \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ex\u003c/i\u003e\u003c/span\u003e by 1. \u003c/li\u003e\u003cli\u003e Operation \u003cspan class\u003d\"tex-font-style-tt\"\u003e--\u003c/span\u003e decreases the value of variable \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ex\u003c/i\u003e\u003c/span\u003e by 1. \u003c/li\u003e\u003c/ul\u003e\u003cp\u003eA statement in language Bit++ is a sequence, consisting of exactly one operation and one variable \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ex\u003c/i\u003e\u003c/span\u003e. The statement is written without spaces, that is, it can only contain characters \"\u003cspan class\u003d\"tex-font-style-tt\"\u003e+\u003c/span\u003e\", \"\u003cspan class\u003d\"tex-font-style-tt\"\u003e-\u003c/span\u003e\", \"\u003cspan class\u003d\"tex-font-style-tt\"\u003eX\u003c/span\u003e\". Executing a statement means applying the operation it contains.\u003c/p\u003e\u003cp\u003eA programme in Bit++ is a sequence of statements, each of them needs to be executed. Executing a programme means executing all the statements it contains.\u003c/p\u003e\u003cp\u003eYou\u0027re given a programme in language Bit++. The initial value of \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ex\u003c/i\u003e\u003c/span\u003e is \u003cspan class\u003d\"tex-span\"\u003e0\u003c/span\u003e. Execute the programme and find its final value (the value of the variable when this programme is executed).\u003c/p\u003e"}},{"title":"Input","value":{"format":"HTML","content":"\u003cp\u003eThe first line contains a single integer \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003en\u003c/i\u003e\u003c/span\u003e \u003cspan class\u003d\"tex-span\"\u003e(1 ≤ \u003ci\u003en\u003c/i\u003e ≤ 150)\u003c/span\u003e — the number of statements in the programme.\u003c/p\u003e\u003cp\u003eNext \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003en\u003c/i\u003e\u003c/span\u003e lines contain a statement each. Each statement contains exactly one operation (\u003cspan class\u003d\"tex-font-style-tt\"\u003e++\u003c/span\u003e or \u003cspan class\u003d\"tex-font-style-tt\"\u003e--\u003c/span\u003e) and exactly one variable \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ex\u003c/i\u003e\u003c/span\u003e (denoted as letter «\u003cspan class\u003d\"tex-font-style-tt\"\u003eX\u003c/span\u003e»). Thus, there are no empty statements. The operation and the variable can be written in any order.\u003c/p\u003e"}},{"title":"Output","value":{"format":"HTML","content":"\u003cp\u003ePrint a single integer — the final value of \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ex\u003c/i\u003e\u003c/span\u003e.\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\u003e1\n++X\n\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003e1\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\u003e2\nX++\n--X\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"}}]}