{"trustable":true,"prependHtml":"\u003cstyle type\u003d\"text/css\"\u003edd \u003e pre {\n display: block;\n padding: 9.5px;\n margin: 0 0 10px;\n font-size: 13px;\n line-height: 1.42857143;\n word-break: break-all;\n word-wrap: break-word;\n color: #333;\n background-color: #f5f5f5;\n border: 1px solid #ccc;\n border-radius: 4px;\n}\u003c/style\u003e","sections":[{"title":"Description","value":{"format":"HTML","content":"\u003cdiv\u003e\u003cspan style\u003d\"font-size: medium\"\u003e给定正整数n,m。求\u003c/span\u003e\u003c/div\u003e\r\n\u003cdiv\u003e\u003cspan style\u003d\"font-size: medium\"\u003e\u0026nbsp;\u003cimg height\u003d\"93\" width\u003d\"199\" alt\u003d\"\" src\u003d\"CDN_BASE_URL/0f5199004b15da263e5448f87346bf8e?v\u003d1714128080\"\u003e\u003c/span\u003e\u003c/div\u003e\r\n\u003cdiv\u003e\u003cspan style\u003d\"font-size: medium\"\u003e\u0026nbsp;\u003c/span\u003e\u003c/div\u003e"}},{"title":"Input","value":{"format":"HTML","content":"\u003cdiv\u003e\u003cspan style\u003d\"font-size: medium\"\u003e一行两个整数n,m。\u003c/span\u003e\u003c/div\u003e"}},{"title":"Output","value":{"format":"HTML","content":"\u003cdiv\u003e\u003cspan style\u003d\"font-size: medium\"\u003e一个整数,为答案模1000000007后的值。\u003c/span\u003e\u003c/div\u003e"}},{"title":"Sample","value":{"format":"HTML","content":"\u003ctable class\u003d\"vjudge_sample\"\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\u003e5 4\r\n\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003e424\r\n\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n"}},{"title":"Hint","value":{"format":"HTML","content":"\u003cp\u003e\u003cspan style\u003d\"font-size: medium\"\u003e数据规模:\u003cbr\u003e\u003cbr\u003e\r\n1\u0026lt;\u003dn,m\u0026lt;\u003d500000,共有3组数据。\u003c/span\u003e\u003c/p\u003e"}}]}