S=input()
N=len(S)

X=-float("inf")
for _ in range(N):
    F=1
    for i in range(N-1):
        if S[i:i+2] in {"++","+-","-+","--"}:
            F=0
    if {S[0],S[-1]} & {"+","-"}:
        F=0

    I=0
    while I<N and S[I]=="0":
        I+=1

    if F:
        X=max(X,eval(S[I:]))
    S=S[-1]+S[:-1]
print(X)