Cod sursa(job #792505)
#include <cstdio>
#define LG_MAX 100005
using namespace std;
int i;
char s[LG_MAX];
int PlusMinus();
int Paranteza()
{
int rez = 0;
if (s[i] >= '0' && s[i] <= '9')
while (s[i] >= '0' && s[i] <= '9')
{
rez = rez * 10 + s[i] - '0';
++i;
}
else
if (s[i] == '(')
{
++i;
rez = PlusMinus();
++i;
}
return rez;
}
int OriImpartit()
{
int rez = Paranteza();
if (s[i] == '*' || s[i] == '/')
{
++i;
if (s[i - 1] == '*')
rez *= Paranteza();
else
rez /= Paranteza();
}
return rez;
}
int PlusMinus()
{
int rez = OriImpartit();
if (s[i] == '+' || s[i] == '-')
{
++i;
if (s[i - 1] == '+')
rez += OriImpartit();
else
rez -= OriImpartit();
}
return rez;
}
int main()
{
freopen ("evaluare.in", "r", stdin);
freopen ("evaluare.out", "w", stdout);
fgets (s, LG_MAX, stdin);
i = 0;
printf ("%d\n", PlusMinus());
return 0;
}