{"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":"\u003cp\u003eA linguagem de programação clássica de Bitland é a Bit++. \u003c/p\u003e\u003cp\u003eBit++ é uma linguagem tão peculiar que tem exatamente uma variável, chamada \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ex\u003c/i\u003e\u003c/span\u003e. Além disso, existem duas operações:\u003c/p\u003e\u003cul\u003e \u003cli\u003e A operação \u003cspan class\u003d\"tex-font-style-tt\"\u003e++\u003c/span\u003e aumenta o valor da variável \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ex\u003c/i\u003e\u003c/span\u003e em 1. \u003c/li\u003e\u003cli\u003e A operação \u003cspan class\u003d\"tex-font-style-tt\"\u003e--\u003c/span\u003e diminui o valor da variável \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ex\u003c/i\u003e\u003c/span\u003e em 1. \u003c/li\u003e\u003c/ul\u003e\u003cp\u003eUma declaração na linguagem Bit++ é uma sequência, consistindo exatamente de uma operação e uma variável \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ex\u003c/i\u003e\u003c/span\u003e. A declaração é escrita sem espaços, ou seja, só pode conter os caracteres \"\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\". Executar uma declaração significa aplicar a operação que ela contém.\u003c/p\u003e\u003cp\u003eUm programa em Bit++ é uma sequência de declarações, cada uma delas precisa ser executada. Executar um programa significa executar todas as declarações que ele contém.\u003c/p\u003e\u003cp\u003eVocê recebe um programa na linguagem Bit++. O valor inicial de \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ex\u003c/i\u003e\u003c/span\u003e é \u003cspan class\u003d\"tex-span\"\u003e0\u003c/span\u003e. Execute o programa e encontre seu valor final (o valor da variável quando este programa é executado).\u003c/p\u003e"}},{"title":"Entrada","value":{"format":"HTML","content":"\u003cp\u003eA primeira linha contém um único inteiro \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 — o número de declarações no programa.\u003c/p\u003e\u003cp\u003eAs próximas \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003en\u003c/i\u003e\u003c/span\u003e linhas contêm uma declaração cada. Cada declaração contém exatamente uma operação (\u003cspan class\u003d\"tex-font-style-tt\"\u003e++\u003c/span\u003e ou \u003cspan class\u003d\"tex-font-style-tt\"\u003e--\u003c/span\u003e) e exatamente uma variável \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ex\u003c/i\u003e\u003c/span\u003e (indicada pela letra \"\u003cspan class\u003d\"tex-font-style-tt\"\u003eX\u003c/span\u003e\"). Assim, não há declarações vazias. A operação e a variável podem ser escritas em qualquer ordem.\u003c/p\u003e"}},{"title":"Saída","value":{"format":"HTML","content":"\u003cp\u003eImprima um único inteiro — o valor final de \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ex\u003c/i\u003e\u003c/span\u003e.\u003c/p\u003e"}},{"title":"Exemplo 1","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"}},{"title":"Exemplo 2","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"}}]}