S = input()
N = len(S)
M = S.count('1')
K = 0

for i in range(N):
    if S[i]=='1':
        K += i+1

dp = [[[0]*(K+1) for _ in range(M+1)] for _ in range(N+1)]
dp[0][0][0] = 1

for i in range(N):
    for j in range(M+1):
        for k in range(K+1):
            dp[i+1][j][k] += dp[i][j][k]
            
            if j+1<=M and k+i+1<=K:
                dp[i+1][j+1][k+i+1] += dp[i][j][k]

print(dp[N][M][K])