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#include <fstream>
using namespace std;
ifstream fin ("evaluare.in");
ofstream fout ("evaluare.out");
int i;
char c[100000];
int eval();
int termen();
int factor();
int main()
{
fin.getline(c, 100000);
fout << eval();
return 0;
}
int eval()
{
int e=termen();
while(c[i]=='+'||c[i]=='-')
{
if(c[i]=='+')
{
i++;
e+=termen();
}
else if(c[i]=='-')
{
i++;
e-=termen();
}
}
return e;
}
int termen()
{
int t=factor();
while(c[i]=='*'||c[i]=='/')
{
if(c[i]=='*')
{
i++;
t=t*factor();
}
else if(c[i]=='/')
{
i++;
t=t/factor();
}
}
return t;
}
int factor()
{
int f=0;
if(c[i]=='(')
{
i++;
f=eval();
i++;
}
else
while(c[i]>='0'&&c[i]<='9')
{
f=f*10+c[i]-'0';
i++;
}
return f;
}