import sys, random
input = lambda : sys.stdin.readline().rstrip()


write = lambda x: sys.stdout.write(x+"\n"); writef = lambda x: print("{:.12f}".format(x))
debug = lambda x: sys.stderr.write(x+"\n")
YES="Yes"; NO="No"; pans = lambda v: print(YES if v else NO); INF=10**18
LI = lambda : list(map(int, input().split())); II=lambda : int(input()); SI=lambda : [ord(c)-ord("a") for c in input()]
def debug(_l_):
    for s in _l_.split():
        print(f"{s}={eval(s)}", end=" ")
    print()
def dlist(*l, fill=0):
    if len(l)==1:
        return [fill]*l[0]
    ll = l[1:]
    return [dlist(*ll, fill=fill) for _ in range(l[0])]

s = input()
n = len(s)
dp = [[0]*(n+1) for _ in range(2)]
dp[0][0] = 1
M = 998244353
for i in range(n):
    ndp = [[0]*(n+1) for _ in range(2)]
    if s[i]=="(":
        l = [1]
    elif s[i]==")":
        l = [-1]
    elif s[i]=="?":
        l = [2,-2]
    else:
        l = [1,2,-1,-2]
    for b in range(2):
        for j in range(n+1):
            val = dp[b][j]
            if val==0:
                continue
            for v in l:
                if v>0:
                    if v==1 or b==0:
                        ndp[b][j+1] += val
                        ndp[b][j+1] %= M
                elif j>0:
                    if v==-1:
                        ndp[b][j-1] += val
                        ndp[b][j-1] %= M
                    else:
                        # v = -2
                        ndp[1][j-1] += val
                        ndp[1][j-1] %= M
    dp = ndp
#     print(dp)
ans = dp[0][0] + dp[1][0]
print(ans%M)