{"trustable":false,"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":"MD","content":"\u003csection\u003e\n\u003cp\u003eCó \u003cvar\u003e\\(N\\)\u003c/var\u003e viên đá, được đánh số từ \u003cvar\u003e\\(1, 2, \\ldots, N\\)\u003c/var\u003e.\nViên đá thứ \u003cvar\u003e\\(i\\)\u003c/var\u003e (\u003cvar\u003e\\(1 \\leq i \\leq N\\)\u003c/var\u003e) có chiều cao \u003cvar\u003e\\(h_i\\)\u003c/var\u003e.\u003c/p\u003e\n\u003cp\u003eCó một con ếch đang đứng trên viên đá \u003cvar\u003e\\(1\\)\u003c/var\u003e ban đầu.\nNó sẽ lặp lại hành động sau một số lần để đến được viên đá \u003cvar\u003e\\(N\\)\u003c/var\u003e:\u003c/p\u003e\n\u003cul\u003e\n\u003cli\u003eNếu con ếch đang đứng trên viên đá \u003cvar\u003e\\(i\\)\u003c/var\u003e, nó sẽ nhảy tới viên đá \u003cvar\u003e\\(i + 1\\)\u003c/var\u003e hoặc viên đá \u003cvar\u003e\\(i + 2\\)\u003c/var\u003e. Chi phí cho bước nhảy này là \u003cvar\u003e\\(|h_i - h_j|\\)\u003c/var\u003e, trong đó \u003cvar\u003e\\(j\\)\u003c/var\u003e là viên đá mà con ếch nhảy đến.\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp\u003eTìm chi phí tối thiểu để con ếch nhảy đến viên đá \u003cvar\u003e\\(N\\)\u003c/var\u003e.\u003c/p\u003e\n\u003c/section\u003e"}},{"title":"Dữ liệu vào","value":{"format":"MD","content":"- Dòng đầu tiên chứa số nguyên $N$ ($1 \\le N \\le 10^5$) \u0026mdash; số viên đá.\n- Dòng thứ hai chứa $N$ số nguyên $h_1, h_2, \n\\dots, h_n$ ($1 \\le h_i \\le 10^4, \\forall i \u003d 1, 2, \\dots, N$) \u0026mdash; chiều cao của các viên đá."}},{"title":"Kết quả","value":{"format":"MD","content":"\u003csection\u003e\n\u003cp\u003eIn ra chi phí tối thiểu để con ếch có thể nhảy đến viên đá $N$.\u003c/p\u003e\n\u003c/section\u003e"}},{"title":"Ví dụ 1","value":{"format":"MD","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\n10 30 40 20\n\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003e30\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\u003eNếu con ếch nhảy từ \u003cvar\u003e\\(1\\)\u003c/var\u003e → \u003cvar\u003e\\(2\\)\u003c/var\u003e → \u003cvar\u003e\\(4\\)\u003c/var\u003e, chi phí sẽ là \u003cvar\u003e\\(|10 - 30| + |30 - 20| \u003d 30\\)\u003c/var\u003e.\u003c/p\u003e\n\u003c/section\u003e"}},{"title":"Ví dụ 2","value":{"format":"MD","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\n10 10\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\n\n\u003csection\u003e\n\n\n\u003c/section\u003e\n\n\u003csection\u003e\n\n\n\u003cp\u003eNếu con ếch đi từ \u003cvar\u003e\\(1\\)\u003c/var\u003e → \u003cvar\u003e\\(2\\)\u003c/var\u003e, chi phí sẽ là \u003cvar\u003e\\(|10 - 10| \u003d 0\\)\u003c/var\u003e.\u003c/p\u003e\n\u003c/section\u003e"}},{"title":"Ví dụ 3","value":{"format":"MD","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\u003e6\n30 10 60 10 60 50\n\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003e40\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\u003eNếu con ếch nhảy từ \u003cvar\u003e\\(1\\)\u003c/var\u003e → \u003cvar\u003e\\(3\\)\u003c/var\u003e → \u003cvar\u003e\\(5\\)\u003c/var\u003e → \u003cvar\u003e\\(6\\)\u003c/var\u003e, chi phí sẽ là \u003cvar\u003e\\(|30 - 60| + |60 - 60| + |60 - 50| \u003d 40\\)\u003c/var\u003e.\u003c/p\u003e\u003c/section\u003e"}}]}