#include <iostream>
#include <cstring>
#include <algorithm>
#include <limits.h>
#define REP(i,a,b) for(i=a;i<b;i++)
#define rep(i,n) REP(i,0,n)

using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
/* ここからが本編 */
/*  */
/* 入力開始！ */
/* 入力終了！ */

int n;
void suuzi(char s[],int i,int& j)
{
  for(; j < n/2; j++) {
    if(s[i+j] < '0' || '9' < s[i+j]) break;
  }
}
int main(void)
{
  int i,j,k,l;
  char s[25];
  int mem1;
  int rep = INT_MIN;
  cin >> s;
  strcat(s,s);
  n = strlen(s);
  for(i = 0; i < n/2; i++) {
    int m = 1;
    for(j = 0; j < n/2; j++) {
      if(s[i+j] == '+' || s[i+j] == '-') {
        if(m == 1) break;
        else m = 1;
      }
      if('0' <= s[i+j] && s[i+j] <= '9') m = 0;
    }
	/*
	cout << endl;  
	cout << "i = " << i << endl;
	cout << "j = " << j << endl;
	*/
	if(m == 1) continue;
    if(j == n/2) {
	  mem1 = s[i+n/2];
	  s[i+n/2] = 0;
	  /*
	  for(j=0;j<n/2;j++) {
		cout << s[i+j];
	  }
	  cout << endl;
	  */
      int ans;
      j = 0;
      ans = atoi(s+i+j); suuzi(s,i,j);
	  /*
	  cout << "ans = " << ans << endl;  
	  cout << "j = " << j << endl;
	  */
	  // s[j] = '+' or '-'
      while(j < n/2) {
		ans += atoi(s+i+j);
		// cout << "atoi(s+i+j) = " << atoi(s+i+j) << endl;
		j++;
		// '0' <= s[i+j] <= '9' 
		// cout << "ans = " << ans << endl; 
		suuzi(s,i,j);
      }
      if(ans > rep) rep = ans;
    }
	s[i+n/2] = mem1;
  }
  cout << rep << endl;
  return 0;
}