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1018(brute force(3).js
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1018(brute force(3).js
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const { count } = require('console')
const { off, mainModule } = require('process')
const readline = require('readline')
const rl = readline.createInterface({
input: process.stdin,
output: process.stdout,
})
const data = []
rl.on('line', (input) => {
data.push(input)
}).on('close', () => {
let [N, M] = data.shift().split(' ').map(Number)
let board = data.map((i) => i.split(''))
//여기서 split()과 split('')의 차이
let black = ['BWBWBWBW', 'WBWBWBWB']
let white = ['WBWBWBWB', 'BWBWBWBW']
let result=[]
for (let i = 0; i < N; i++) {
for (let j = 0; j < M; j++) {
let countBlack = 0
let countWhite = 0
if (i + 8 <= N && j + 8 <= M) {
for (let x = 0; x < 8; x++) {
for (let y = 0; y < 8; y++) {
if (board[i + x][j + y] !== black[x % 2][y]) {
countBlack++
}
if (board[i + x][j + y] !== white[x % 2][y]) {
countWhite++
}
}
}
result.push(countBlack,countWhite)
//한 좌표를 기준으로 black으로 시작 한 경우,white으로 시작 한 경우를
//모두 다 push
}
//result.push(Math.min(countBlack,countWhite))
//여기다 하면 if에 안 걸리더라도 countBlack,countWhite가 0으로 계속 push가 된다
}
}
console.log(Math.min(...result))
process.exit()
})