"use strict"; const {Fragment: _Fragment, jsx: _jsx, jsxs: _jsxs} = arguments[0]; const {useMDXComponents: _provideComponents} = arguments[0]; function _createMdxContent(props) { const _components = { a: "a", annotation: "annotation", code: "code", figure: "figure", h2: "h2", img: "img", li: "li", math: "math", mi: "mi", mn: "mn", mo: "mo", mrow: "mrow", p: "p", pre: "pre", semantics: "semantics", span: "span", ul: "ul", ..._provideComponents(), ...props.components }; return _jsxs(_Fragment, { children: [_jsx(_components.p, { children: _jsx(_components.a, { href: "https://www.acmicpc.net/problem/1107", children: "문제 링크" }) }), "\n", _jsx(_components.h2, { children: "문제" }), "\n", _jsx(_components.p, { children: "수빈이는 TV를 보고 있다. 수빈이는 채널을 돌리려고 했지만, 버튼을 너무 세게 누르는 바람에, 일부 숫자 버튼이 고장났다." }), "\n", _jsx(_components.p, { children: "리모컨에는 버튼이 0부터 9까지 숫자, +와 -가 있다. +를 누르면 현재 보고있는 채널에서 +1된 채널로 이동하고, -를 누르면 -1된 채널로 이동한다. 채널 0에서 -를 누른 경우에는 채널이 변하지 않고, 채널은 무한대 만큼 있다." }), "\n", _jsx(_components.p, { children: "수빈이가 지금 이동하려고 하는 채널은 N이다. 어떤 버튼이 고장났는지 주어졌을 때, 채널 N으로 이동하기 위해서 버튼을 최소 몇 번 눌러야하는지 구하는 프로그램을 작성하시오." }), "\n", _jsx(_components.p, { children: "수빈이가 지금 보고 있는 채널은 100번이다." }), "\n", _jsx(_components.h2, { children: "입력" }), "\n", _jsx(_components.p, { children: "첫째 줄에 수빈이가 이동하려고 하는 채널 N (0 ≤ N ≤ 500,000)이 주어진다. 둘째 줄에는 고장난 버튼의 개수 M (0 ≤ M ≤ 10)이 주어진다. 고장난 버튼이 있는 경우에는 셋째 줄에는 고장난 버튼이 주어지며, 같은 버튼이 여러 번 주어지는 경우는 없다." }), "\n", _jsx(_components.h2, { children: "출력" }), "\n", _jsx(_components.p, { children: "첫째 줄에 채널 N으로 이동하기 위해 버튼을 최소 몇 번 눌러야 하는지를 출력한다." }), "\n", _jsx(_components.h2, { children: "풀이" }), "\n", _jsxs(_components.p, { children: ["기본 비교 대상은 현재 채널 ", _jsx(_components.code, { children: "100" }), "에서 ", _jsx(_components.code, { children: "+" }), ", ", _jsx(_components.code, { children: "-" }), "만 눌러 이동하는 경우다. 하지만 숫자 버튼으로 어떤 채널을 직접 누른 뒤 남은 차이만큼 ", _jsx(_components.code, { children: "+" }), ", ", _jsx(_components.code, { children: "-" }), "를 쓰는 편이 더 이득일 수 있으므로, 직접 입력 가능한 가장 가까운 채널을 찾아야 한다."] }), "\n", _jsxs(_components.p, { children: ["코드에서는 목표 채널 ", _jsx(_components.code, { children: "N" }), "에서부터 거리 ", _jsx(_components.code, { children: "i = 0, 1, 2, ..." }), "로 바깥쪽을 넓혀 가며 ", _jsx(_components.code, { children: "N - i" }), ", ", _jsx(_components.code, { children: "N + i" }), " 두 채널을 차례대로 검사한다. 각 후보 채널의 모든 자릿수가 고장 나지 않은 버튼으로만 이루어져 있으면, 그 채널까지의 숫자 입력 횟수와 지금까지 벌린 거리 ", _jsx(_components.code, { children: "i" }), "를 합쳐 답 후보로 사용할 수 있다."] }), "\n", _jsxs(_components.p, { children: ["중간에 숫자 버튼이 전부 고장난 경우처럼 예외도 따로 처리한다. 마지막에는 이렇게 찾은 값과 ", _jsx(_components.code, { children: "abs(N - 100)" }), "을 비교해서 더 작은 쪽을 정답으로 고르면 된다."] }), "\n", _jsx(_components.h2, { children: "코드" }), "\n", _jsx(_components.figure, { "data-rehype-pretty-code-figure": "", children: _jsx(_components.pre, { style: { backgroundColor: "#2e3440ff", color: "#d8dee9ff" }, tabIndex: "0", "data-language": "cpp", "data-theme": "nord", children: _jsxs(_components.code, { "data-language": "cpp", 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"katex", children: [_jsx(_components.span, { className: "katex-mathml", children: _jsx(_components.math, { xmlns: "http://www.w3.org/1998/Math/MathML", children: _jsxs(_components.semantics, { children: [_jsx(_components.mrow, { children: _jsx(_components.mi, { children: "R" }) }), _jsx(_components.annotation, { encoding: "application/x-tex", children: "R" })] }) }) }), _jsx(_components.span, { className: "katex-html", "aria-hidden": "true", children: _jsxs(_components.span, { className: "base", children: [_jsx(_components.span, { className: "strut", style: { height: "0.6833em" } }), _jsx(_components.span, { className: "mord mathnormal", style: { marginRight: "0.0077em" }, children: "R" })] }) })] }), ", 자릿수를 ", _jsxs(_components.span, { className: "katex", children: [_jsx(_components.span, { className: "katex-mathml", children: _jsx(_components.math, { xmlns: "http://www.w3.org/1998/Math/MathML", children: _jsxs(_components.semantics, { children: [_jsx(_components.mrow, { children: 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_jsx(_components.h2, { children: "마무리" }), "\n", _jsxs(_components.p, { children: ["리모컨 문제는 완전탐색이지만, 모든 채널을 다 보지 않고 목표 근처에서 바깥으로 넓혀 가는 식으로 줄일 수 있다. 결국 숫자로 직접 갈지, ", _jsx(_components.code, { children: "+/-" }), "만 쓸지 둘 중 더 싼 쪽을 고르면 된다."] }), "\n", _jsx(_components.p, { children: _jsx(_components.img, { src: "/generated/posts/algorithm/boj-1107/assets/1.png", alt: "" }) })] }); } function MDXContent(props = {}) { const {wrapper: MDXLayout} = { ..._provideComponents(), ...props.components }; return MDXLayout ? _jsx(MDXLayout, { ...props, children: _jsx(_createMdxContent, { ...props }) }) : _createMdxContent(props); } return { default: MDXContent };

BOJ 1107 - 리모컨