Node.js) 백준 2559번 : 수열

https://www.acmicpc.net/problem/2559

2559번: 수열

const fs = require('fs');
const [NK, num] = fs.readFileSync("./dev/stdin").toString().trim().split("\n").map(v => v.split(' ').map(Number));
const [N, K] = NK;
let sum = 0;
const answer = [];
for (let i = 0; i < K; i++) {
  sum += num[i];
}
answer.push(sum);

for (let i = K; i < N; i++) {
  sum = sum - num[i - K] + num[i];
  answer.push(sum);
}
console.log(Math.max(...answer));