#include <cstdio>
#include <cctype>
#include <cstring>

#define SIZE 100004

using namespace std;

char s[SIZE], operator_st[SIZE];

int sol, len, operator_st_top, operand_st_top, operand_st[SIZE];

inline int priority( char c )
{
    if( c == '*' || c == '/' || c == '%' )
        return 2;
    if( c == '+' || c == '-' )
        return 1;
    return 0;
}

inline int isoperator( char c )
{
    if( strchr("+-*/%", c) )
        return 1;
    return 0;
}

inline int calc(int nr1, int nr2, char op)
{
    //printf("%d %c %d ==", nr2, op, nr1);

    if( op == '+' )
        nr2 += nr1;
    else if( op == '-' )
        nr2 -= nr1;
    else if( op == '*')
        nr2 *= nr1;
    else if( op == '/' )
        nr2 /= nr1;
    else if( op == '%')
        nr2 %= nr1;
 //   printf("  %d\n", nr2);
    sol = nr2;
    return nr2;
}
int main()
{
    freopen("evaluare.in", "r", stdin);
    freopen("evaluare.out", "w", stdout);
    s[0] = '(';
    gets(s + 1);
    len = strlen( s);
    s[len] = ')';
    int i = 0;

    while( i <= len )
    {

        while ( isspace(s[i]) && i <= len )
            ++i;

        if( s[i] == '(' )
            operator_st[ ++operator_st_top ] = s[ i++ ];

        if( isdigit(s[i]) )
        {
            int nr =  0;
            while ( isdigit(s[i]) && i <= len )
            {
                nr = nr * 10 + s[i] - 48;
                ++i;
            }
            operand_st[ ++operand_st_top ] = nr;
        }
        if( isoperator( s[i] ) )
            if ( operator_st_top == 0 || priority(operator_st[operator_st_top]) < priority(s[i]))
                operator_st[ ++operator_st_top ] = s[ i++ ];
            else
            {
                while (priority(operator_st[operator_st_top]) >= priority(s[i]) && operator_st_top > 0)
                {
                    char op = operator_st[operator_st_top];
                    operator_st_top--;
                    int nr1 = 0, nr2 =0;
                    nr1 = operand_st[operand_st_top];
                    operand_st_top--;
                    nr2 = operand_st[operand_st_top];

                    operand_st[operand_st_top] = calc(nr1, nr2, op);
                }
                operator_st[ ++operator_st_top ] = s[ i++ ];
            }

        if( s[i] == ')' )
        {
            while( operator_st[operator_st_top] != '(')
            {
        //     printf("%c!\n\n", s[i]);

                char op = operator_st[operator_st_top];
                int nr1 = 0, nr2 = 0;
                nr1 = operand_st[operand_st_top];
                operand_st_top--;
                nr2 = operand_st[operand_st_top];

                operand_st[operand_st_top] = calc(nr1, nr2, op);
                --operator_st_top;
            }
            --operator_st_top;
            ++i;
        }
    }

 //   printf("%s", s);
    printf("%d\n", sol);
    return 0;
}