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1107.js
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1107.js
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/*
1. +- 버튼만으로 이동하는 경우
2. 목표 채널 또는 그 근처의 채널로 바꾸고 +-로 이동하는 경우
*/
const canMoveByNumberButtons = (target, brokenButtons) => (
target.split('').every((number) => !brokenButtons.has(number))
);
const findClosestMovableChannel = (target, brokenButtons) => {
let result = Infinity;
for (let channel = 0; channel <= 999_999; channel += 1) {
if (canMoveByNumberButtons(channel.toString(), brokenButtons)) {
result = Math.min(result, channel.toString().length + Math.abs(target - channel));
}
}
return result;
};
const INPUT_FILE = process.platform === 'linux' ? '/dev/stdin' : './input';
const [target, _, ...brokenButtons] = require('fs').readFileSync(INPUT_FILE).toString().trim()
.split(/\s/);
const moveCountByPlusMinusButtons = Math.abs(100 - Number(target));
const moveCountByNumberButtons = (
findClosestMovableChannel(Number(target), new Set(brokenButtons))
);
console.log(Math.min(moveCountByNumberButtons, moveCountByPlusMinusButtons));