import sys

# sys.setrecursionlimit(1000005)
# sys.set_int_max_str_digits(200005)
int1 = lambda x: int(x)-1
pDB = lambda *x: print(*x, end="\n", file=sys.stderr)
p2D = lambda x: print(*x, sep="\n", end="\n\n", file=sys.stderr)
def II(): return int(sys.stdin.readline())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]
def LI1(): return list(map(int1, sys.stdin.readline().split()))
def LLI1(rows_number): return [LI1() for _ in range(rows_number)]
def SI(): return sys.stdin.readline().rstrip()

# dij = [(0, 1), (-1, 0), (0, -1), (1, 0)]
dij = [(0, 1), (-1, 0), (0, -1), (1, 0), (1, 1), (1, -1), (-1, 1), (-1, -1)]
# inf = -1-(-1 << 31)
inf = -1-(-1 << 63)
md = 10**9+7
# md = 998244353

s=SI()
n=len(s)
ones=[]
for i,c in enumerate(s):
    if c=="1":ones.append(i)

m=len(ones)
sl,sr=-m*n,m*n
dp=[[0]*(sr-sl+1) for _ in range(m+1)]
dp[0][0]=1

for i in range(n):
    for l in range(m)[::-1]:
        for s in range(sl,sr+1):
            pre=dp[l][s]
            if pre==0:continue
            dp[l+1][s+i-ones[l]]+=pre

print(dp[m][0])