747 B | 747 chars
import sys
from math import sqrt, pi, sin, factorial
inp = lambda : sys.stdin.readline()[:-1].strip()
mii = lambda x = " " : [*map(int,inp().split(x))]
mfi = lambda x = " " : [*map(float,inp().split(x))]
ii = lambda : int(inp())
fi = lambda : float(inp())
def solve():
s = inp()
prev = '('
l = [0]
n = len(s)
for i in range(1, n):
crt = s[i]
if crt == prev:
l.append(l[-1] + (1 if crt == '(' else -1))
else:
l.append(l[-1])
prev = crt
m = max(l)
for i in range(m, -1, -1):
for j in range(n):
if l[j] == i:
print(end=('/' if s[j] == '(' else '\\'))
else:
print(end=".")
print()
if __name__ == "__main__":
tc = 1
for t in range(tc):
solve()