Node.js) 백준 10799번: 쇠막대기

https://www.acmicpc.net/problem/10799

10799번: 쇠막대기

 

const fs = require('fs');
const input = fs.readFileSync('./dev/stdin').toString().trim();
// console.log(input);

let stick = 1;

let answer = 0;
for (let i = 1; i < input.length; i++) {
        if (input[i] === ')') {
                if (input[i - 1] === '(') {
                        stick -= 1;
                        answer += stick;
                } else {
                        stick -= 1;
                        answer += 1;
                }
        } else {
                stick += 1;
        }
        // console.log(i, ' ', stick, ' ', answer);
}

console.log(answer);