#include<bits/stdc++.h> using lint=long long; bool is_symbol(char c){return c=='+'||c=='-';} int main(){ std::cin.tie(nullptr);std::ios_base::sync_with_stdio(false); std::cout.setf(std::ios_base::fixed);std::cout.precision(15); std::string s;std::cin>>s; lint n=s.length(); lint ans=std::numeric_limits<lint>::min(); for(lint i=0;i<n;i++,std::rotate(s.begin(),s.begin()+1,s.end())){ if(is_symbol(s.front())||is_symbol(s.back()))continue; lint now=0; for(lint j=0,x=0,neg=false;j<=n;j++){ if(j==n||is_symbol(s.at(j))){ now+=neg?-x:x; x=0; if(j<n)neg=s.at(j)=='-'; }else{ x=10*x+s.at(j)-'0'; } } if(ans<now)ans=now; } std::cout<<ans<<'\n'; }