#include <fstream>
#include <cstring>
using namespace std;
ifstream f("evaluare.in");
ofstream g("evaluare.out");
char s[100001],*p;
int n;
int eval();
int factor()
{long long r=0;
    if (*p=='(') ++p,r=eval(),++p;
    else while('0'<=*p && *p<='9') r*=10,r+=*p-'0',++p;
    return r;
}
int termen()
{long long r=factor();
    while (*p=='*'){++p,r*=factor();break;}
    while (*p=='/'){++p,r/=factor();break;}
    return r;
}
int eval()
{long long r=termen();
    while (*p=='+'){++p,r+=termen();break;}
    while (*p=='-'){++p,r-=termen();break;}
    return r;
}
int main()
{
    f.getline(s,100001),p=s,g<<eval();
    return 0;
}