#include <fstream>
using namespace std;
ifstream f("evaluare.in");
ofstream g("evaluare.out");
const int NMAX = 1e5 + 1;
char S[NMAX], *p;
static inline int Eval ();
static inline int Termen ();
static inline int Factor ();
static inline int Eval ()
{
int r = Termen();
while(*p == '+' || *p == '-')
{
if(*p == '+')
{
++p;
r += Termen();
}
else
{
++p;
r -= Termen();
}
}
return r;
}
static inline int Termen ()
{
int r = Factor();
while(*p == '*' || *p == '/')
{
if(*p == '*')
{
++p;
r *= Factor();
}
else
{
++p;
r /= Factor();
}
}
return r;
}
static inline int Factor ()
{
if(*p == '(')
{
++p;
int r = Eval();
++p;
return r;
}
int ans = 0;
int sign = 1;
if(*p == '-')
sign = -1, ++p;
while(*p >= '0' && *p <= '9')
ans = ans * 10 + (int)(*p - '0'), ++p;
return (ans * sign);
}
static inline void Read ()
{
f.tie(nullptr);
f >> (S + 1);
return;
}
static inline void Solve ()
{
p = (S + 1);
g << Eval() << '\n';
return;
}
int main()
{
Read();
Solve();
return 0;
}