Node.js) 백준 29767번: 점수를 최대로

https://www.acmicpc.net/problem/29767

29767번: 점수를 최대로

const input = require('fs')
	.readFileSync('./dev/stdin')
	.toString()
	.trim()
	.split('\n')
	.map((v) => v.split(' ').map((v) => BigInt(v)));

const [N, K] = input[0];
let sum = BigInt(0);
const prefixSum = [];

for (let i = 0; i < input[1].length; i++) {
	sum += input[1][i];
	prefixSum.push(sum);
}

console.log(
	prefixSum
		.sort((a, b) => Number(b - a))
		.slice(0, Number(K))
		.reduce((r, v) => r + v, BigInt(0))
		.toString()
);