{"trustable":true,"prependHtml":"\u003cstyle type\u003d\"text/css\"\u003e\n section 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: rgba(255, 255, 255, 0.5);\n border: 1px solid #ccc;\n border-radius: 6px;\n }\n\u003c/style\u003e\n\u003cscript\u003e\n window.katexOptions \u003d {\n delimiters: [\n {left: \u0027\\\\(\u0027, right: \u0027\\\\)\u0027, display: false},\n {left: \u0027\\\\[\u0027, right: \u0027\\\\]\u0027, display: true}\n ]\n };\n\u003c/script\u003e\n","sections":[{"title":"Bài toán","value":{"format":"HTML","content":"\u003csection\u003e\n\u003cp\u003eChúng ta có \u003cvar\u003e\\(N\\)\u003c/var\u003e hòm khoá bí mật, được đánh số từ \u003cvar\u003e\\(1\\)\u003c/var\u003e đến \u003cvar\u003e\\(N\\)\u003c/var\u003e.\u003c/p\u003e\n\u003cp\u003eMột cửa hàng bán \u003cvar\u003e\\(M\\)\u003c/var\u003e chiếc chìa khóa. Chiếc chìa khóa thứ \u003cvar\u003e\\(i\\)\u003c/var\u003e được bán với giá \u003cvar\u003e\\(a_i\\)\u003c/var\u003e yen (đơn vị tiền tệ của Nhật Bản), và nó có thể mở khóa cho \u003cvar\u003e\\(b_i\\)\u003c/var\u003e trong số các hòm: Hòm \u003cvar\u003e\\(c_{i1}\\)\u003c/var\u003e, \u003cvar\u003e\\(c_{i2}\\)\u003c/var\u003e, \u003cvar\u003e\\(...\\)\u003c/var\u003e, \u003cvar\u003e\\(c_{i{b_i}}\\)\u003c/var\u003e. Mỗi chiếc chìa khóa mua có thể được sử dụng bất kỳ số lần nào.\u003c/p\u003e\n\u003cp\u003eTìm chi phí tối thiểu cần thiết để mở khóa tất cả các hòm bí mật. Nếu không thể mở khóa tất cả chúng, in ra \u003cvar\u003e\\(-1\\)\u003c/var\u003e.\u003c/p\u003e\n\u003c/section\u003e"}},{"title":"Điều kiện","value":{"format":"HTML","content":"\u003csection\u003e\n\u003cul\u003e\n\u003cli\u003eTất cả các giá trị trong đầu vào là số nguyên.\u003c/li\u003e\n\u003cli\u003e\u003cvar\u003e\\(1 \\leq N \\leq 12\\)\u003c/var\u003e\u003c/li\u003e\n\u003cli\u003e\u003cvar\u003e\\(1 \\leq M \\leq 10^3\\)\u003c/var\u003e\u003c/li\u003e\n\u003cli\u003e\u003cvar\u003e\\(1 \\leq a_i \\leq 10^5\\)\u003c/var\u003e\u003c/li\u003e\n\u003cli\u003e\u003cvar\u003e\\(1 \\leq b_i \\leq N\\)\u003c/var\u003e\u003c/li\u003e\n\u003cli\u003e\u003cvar\u003e\\(1 \\leq c_{i1} \u0026lt; c_{i2} \u0026lt; ... \u0026lt; c_{i{b_i}} \\leq N\\)\u003c/var\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/section\u003e"}},{"title":"Đầu vào","value":{"format":"HTML","content":"\u003csection\u003e\n\u003cp\u003eĐầu vào được cung cấp từ Đầu vào Chuẩn theo định dạng sau:\u003c/p\u003e\n\u003cpre\u003e\u003cvar\u003e\\(N\\)\u003c/var\u003e \u003cvar\u003e\\(M\\)\u003c/var\u003e\r\n\u003cvar\u003e\\(a_1\\)\u003c/var\u003e \u003cvar\u003e\\(b_1\\)\u003c/var\u003e\r\n\u003cvar\u003e\\(c_{11}\\)\u003c/var\u003e \u003cvar\u003e\\(c_{12}\\)\u003c/var\u003e \u003cvar\u003e\\(...\\)\u003c/var\u003e \u003cvar\u003e\\(c_{1{b_1}}\\)\u003c/var\u003e\r\n\u003cvar\u003e\\(:\\)\u003c/var\u003e\r\n\u003cvar\u003e\\(a_M\\)\u003c/var\u003e \u003cvar\u003e\\(b_M\\)\u003c/var\u003e\r\n\u003cvar\u003e\\(c_{M1}\\)\u003c/var\u003e \u003cvar\u003e\\(c_{M2}\\)\u003c/var\u003e \u003cvar\u003e\\(...\\)\u003c/var\u003e \u003cvar\u003e\\(c_{M{b_M}}\\)\u003c/var\u003e\r\n\u003c/pre\u003e\n\n\u003c/section\u003e"}},{"title":"Kết quả","value":{"format":"HTML","content":"\u003csection\u003e\n\u003cp\u003eIn ra chi phí tối thiểu cần thiết để mở khóa tất cả các hòm bí mật.\nNếu không thể mở khóa tất cả chúng, in ra \u003cvar\u003e\\(-1\\)\u003c/var\u003e.\u003c/p\u003e\n\u003c/section\u003e"}},{"title":"Ví dụ 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\u003e2 3\r\n10 1\r\n1\r\n15 1\r\n2\r\n30 2\r\n1 2\r\n\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003e25\r\n\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n\n\u003csection\u003e\n\n\n\u003c/section\u003e\n\n\u003csection\u003e\n\n\n\u003cp\u003eChúng ta có thể mở khóa tất cả các hòm bằng cách mua chiếc chìa khóa thứ nhất và thứ hai, với chi phí là \u003cvar\u003e\\(25\\)\u003c/var\u003e yen, đó là chi phí tối thiểu cần thiết.\u003c/p\u003e\n\u003c/section\u003e"}},{"title":"Ví dụ 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\u003e12 1\r\n100000 1\r\n2\r\n\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003e-1\r\n\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n\n\u003csection\u003e\n\n\n\u003c/section\u003e\n\n\u003csection\u003e\n\n\n\u003cp\u003eChúng ta không thể mở khóa tất cả các hòm.\u003c/p\u003e\n\u003c/section\u003e"}},{"title":"Ví dụ 3","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 6\r\n67786 3\r\n1 3 4\r\n3497 1\r\n2\r\n44908 3\r\n2 3 4\r\n2156 3\r\n2 3 4\r\n26230 1\r\n2\r\n86918 1\r\n3\r\n\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003e69942\r\n\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n\n\u003csection\u003e\n\n\n\u003c/section\u003e\n\n\u003csection\u003e\n\u003c/section\u003e"}}]}