백준 - (# 10799)

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

Code

rod_laser = input()
rod_cnt = 0
result = 0

for i in range(len(rod_laser)-1):
    part = rod_laser[i:i+2]
    if part == '((':
        rod_cnt += 1
        result += 1
    elif part == '()':
        result += rod_cnt
    elif part == '))':
        rod_cnt += -1

print(result)