{"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\u003eA TV show called \"Guess a number!\" is gathering popularity. The whole Berland, the old and the young, are watching the show.\u003c/p\u003e\u003cp\u003eThe rules are simple. The host thinks of an integer \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ey\u003c/i\u003e\u003c/span\u003e and the participants guess it by asking questions to the host. There are four types of acceptable questions:\u003c/p\u003e\u003cul\u003e \u003cli\u003e Is it true that \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ey\u003c/i\u003e\u003c/span\u003e is strictly larger than number \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ex\u003c/i\u003e\u003c/span\u003e? \u003c/li\u003e\u003cli\u003e Is it true that \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ey\u003c/i\u003e\u003c/span\u003e is strictly smaller than number \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ex\u003c/i\u003e\u003c/span\u003e? \u003c/li\u003e\u003cli\u003e Is it true that \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ey\u003c/i\u003e\u003c/span\u003e is larger than or equal to number \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ex\u003c/i\u003e\u003c/span\u003e? \u003c/li\u003e\u003cli\u003e Is it true that \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ey\u003c/i\u003e\u003c/span\u003e is smaller than or equal to number \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ex\u003c/i\u003e\u003c/span\u003e? \u003c/li\u003e\u003c/ul\u003e\u003cp\u003eOn each question the host answers truthfully, \"yes\" or \"no\".\u003c/p\u003e\u003cp\u003eGiven the sequence of questions and answers, find any integer value of \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ey\u003c/i\u003e\u003c/span\u003e that meets the criteria of all answers. If there isn\u0027t such value, print \"\u003cspan class\u003d\"tex-font-style-tt\"\u003eImpossible\u003c/span\u003e\".\u003c/p\u003e"}},{"title":"Input","value":{"format":"HTML","content":"\u003cp\u003eThe first line of the input contains a single integer \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003en\u003c/i\u003e\u003c/span\u003e (\u003cspan class\u003d\"tex-span\"\u003e1 ≤ \u003ci\u003en\u003c/i\u003e ≤ 10000\u003c/span\u003e) — the number of questions (and answers). Next \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003en\u003c/i\u003e\u003c/span\u003e lines each contain one question and one answer to it. The format of each line is like that: \"\u003cspan class\u003d\"tex-font-style-it\"\u003esign x answer\u003c/span\u003e\", where the \u003cspan class\u003d\"tex-font-style-it\"\u003esign\u003c/span\u003e is:\u003c/p\u003e\u003cul\u003e \u003cli\u003e \"\u003cspan class\u003d\"tex-font-style-tt\"\u003e\u0026gt;\u003c/span\u003e\" (for the first type queries), \u003c/li\u003e\u003cli\u003e \"\u003cspan class\u003d\"tex-font-style-tt\"\u003e\u0026lt;\u003c/span\u003e\" (for the second type queries), \u003c/li\u003e\u003cli\u003e \"\u003cspan class\u003d\"tex-font-style-tt\"\u003e\u0026gt;\u003d\u003c/span\u003e\" (for the third type queries), \u003c/li\u003e\u003cli\u003e \"\u003cspan class\u003d\"tex-font-style-tt\"\u003e\u0026lt;\u003d\u003c/span\u003e\" (for the fourth type queries). \u003c/li\u003e\u003c/ul\u003e\u003cp\u003eAll values of \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ex\u003c/i\u003e\u003c/span\u003e are integer and meet the inequation \u003cspan class\u003d\"tex-span\"\u003e - 10\u003csup class\u003d\"upper-index\"\u003e9\u003c/sup\u003e ≤ \u003ci\u003ex\u003c/i\u003e ≤ 10\u003csup class\u003d\"upper-index\"\u003e9\u003c/sup\u003e\u003c/span\u003e. The \u003cspan class\u003d\"tex-font-style-it\"\u003eanswer\u003c/span\u003e is an English letter \"\u003cspan class\u003d\"tex-font-style-tt\"\u003eY\u003c/span\u003e\" (for \"yes\") or \"\u003cspan class\u003d\"tex-font-style-tt\"\u003eN\u003c/span\u003e\" (for \"no\").\u003c/p\u003e\u003cp\u003eConsequtive elements in lines are separated by a single space.\u003c/p\u003e"}},{"title":"Output","value":{"format":"HTML","content":"\u003cp\u003ePrint any of such integers \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ey\u003c/i\u003e\u003c/span\u003e, that the answers to all the queries are correct. The printed number \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ey\u003c/i\u003e\u003c/span\u003e must meet the inequation \u003cspan class\u003d\"tex-span\"\u003e - 2·10\u003csup class\u003d\"upper-index\"\u003e9\u003c/sup\u003e ≤ \u003ci\u003ey\u003c/i\u003e ≤ 2·10\u003csup class\u003d\"upper-index\"\u003e9\u003c/sup\u003e\u003c/span\u003e. If there are many answers, print any of them. If such value doesn\u0027t exist, print word \"\u003cspan class\u003d\"tex-font-style-tt\"\u003eImpossible\u003c/span\u003e\" (without the quotes).\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\u003e4\n\u0026gt;\u003d 1 Y\n\u0026lt; 3 N\n\u0026lt;\u003d -3 N\n\u0026gt; 55 N\n\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003e17\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\n\u0026gt; 100 Y\n\u0026lt; -100 Y\n\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003eImpossible\n\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n"}}]}