{"trustable":false,"sections":[{"title":"","value":{"format":"HTML","content":"\u003cstyle type\u003d\"text/css\"\u003e\nh1,h2,h3,h4,h5,h6{margin-bottom:0;}div.textBG p{margin: 0 0 0.0001pt;}\u003c/style\u003e\n\u003cp\u003e\n\t\u0026nbsp;\u003c/p\u003e\n\u003cdiv class\u003d\"Section1\"\u003e\n\t\u003cp class\u003d\"MsoNormal\" style\u003d\"text-align:justify\"\u003e\n\t\tJohn有n个任务,但是有些任务需要在做完另外一些任务后才能做。\u003c/p\u003e\n\t\u003cp style\u003d\"text-align:justify\"\u003e\n\t\t\u003cb style\u003d\"mso-bidi-font-weight:normal\"\u003e\u003cspan style\u003d\"font-size:18.0pt\"\u003e输入 \u003co:p\u003e\u003c/o:p\u003e\u003c/span\u003e\u003c/b\u003e\u003c/p\u003e\n\t\u003cp style\u003d\"text-align:justify\"\u003e\n\t\t输入有多组数据,每组数据第一行有两个整数\u003cb style\u003d\"mso-bidi-font-weight:normal\"\u003e1 \u0026lt;\u003d n \u0026lt;\u003d 100\u003c/b\u003e 和 \u003cb style\u003d\"mso-bidi-font-weight:normal\"\u003em\u003c/b\u003e。\u003cb style\u003d\"mso-bidi-font-weight:normal\"\u003en\u003c/b\u003e是任务个数(标记为\u003cb style\u003d\"mso-bidi-font-weight:normal\"\u003e1\u003c/b\u003e到\u003cb style\u003d\"mso-bidi-font-weight:normal\"\u003en\u003c/b\u003e),\u003cb style\u003d\"mso-bidi-font-weight:\nnormal\"\u003em\u003c/b\u003e两个任务直接关系的数量。在此之后,有\u003cb style\u003d\"mso-bidi-font-weight:normal\"\u003em\u003c/b\u003e行,每行有2个整数\u003cb style\u003d\"mso-bidi-font-weight:normal\"\u003ei\u003c/b\u003e和\u003cb style\u003d\"mso-bidi-font-weight:\nnormal\"\u003ej\u003c/b\u003e,代表任务\u003cb style\u003d\"mso-bidi-font-weight:\nnormal\"\u003ei\u003c/b\u003e必须在任务\u003cb style\u003d\"mso-bidi-font-weight:normal\"\u003ej\u003c/b\u003e之前完成。用\u003cb style\u003d\"mso-bidi-font-weight:normal\"\u003en \u003d m \u003d 0\u003c/b\u003e结束整个输入。\u003c/p\u003e\n\t\u003cp style\u003d\"text-align:justify\"\u003e\n\t\t\u003cb style\u003d\"mso-bidi-font-weight:normal\"\u003e\u003cspan style\u003d\"font-size:18.0pt\"\u003e输出 \u003co:p\u003e\u003c/o:p\u003e\u003c/span\u003e\u003c/b\u003e\u003c/p\u003e\n\t\u003ch3\u003e\n\t\t\u003cspan style\u003d\"font-weight:normal;mso-bidi-font-weight:bold\"\u003e每一个数据对应一行\u003c/span\u003en\u003cspan style\u003d\"font-weight:normal;mso-bidi-font-weight:\nbold\"\u003e个整数,代表任务完成的顺序。\u003co:p\u003e\u003c/o:p\u003e\u003c/span\u003e\u003c/h3\u003e\n\t\u003ch3\u003e\n\t\t\u003cspan style\u003d\"font-size:18.0pt\"\u003e样例输入\u003co:p\u003e\u003c/o:p\u003e\u003c/span\u003e\u003c/h3\u003e\n\t\u003cpre\u003e\n\t5 4\u003c/pre\u003e\n\t\u003cpre\u003e\n\t1 2\u003c/pre\u003e\n\t\u003cpre\u003e\n\t2 3\u003c/pre\u003e\n\t\u003cpre\u003e\n\t1 3\u003c/pre\u003e\n\t\u003cpre\u003e\n\t1 5\u003c/pre\u003e\n\t\u003cpre\u003e\n\t0 0\u003c/pre\u003e\n\t\u003ch3 style\u003d\"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt\"\u003e\n\t\t\u003cspan style\u003d\"font-size:18.0pt\"\u003e样例输出\u003co:p\u003e\u003c/o:p\u003e\u003c/span\u003e\u003c/h3\u003e\n\t\u003cpre\u003e\n\t1 4 2 5 3\u003c/pre\u003e\n\t\u003cdiv align\u003d\"center\" class\u003d\"MsoNormal\" style\u003d\"text-align:center;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt\"\u003e\n\t\t\u0026nbsp;\u003c/div\u003e\n\t\u003cp class\u003d\"MsoNormal\" style\u003d\"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt\"\u003e\n\t\t\u0026nbsp;\u003c/p\u003e\n\u003c/div\u003e\n\u003cstyle 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