include iostream include stack using namespace std int parse string in

#include <iostream>
#include <stack>
using namespace std;

/*
int parse(string input)
{
    while(input.find('(')!=string::npos)
    {
        int start;
        int len;
        start = input.find('(');
        stack<char> brackets;
        brackets.push('(');
        for(int i=start+1;i<input.length()+1;i++)
        {
            if (input[i]=='(') brackets.push('(');
            if (input[i]==')') brackets.pop();
            if (brackets.empty()) { len = start-i; break; }
        }
        string inbrackets;
        input.copy(inbrackets,start+1,len-1);
        input.replace(start,len,atoi(parse(inbrackets)));
    }
    
}*/


struct oper
{
    int priority;
    char type;
};
struct op
{
    int type;
    int val;
}

int count(string input)
{
    stack<op> operands;
    stack<oper> operations;
    int pos = 0;
    while (pos<input.length())
    {
        int op =0;
        while (isdigit(input[pos]))
        {
            op*=10;
            op+=input[pos++]-48;
        }
        operands.push(op);
        if (pos<input.length())
        {
            operations.push(input[pos++]);
        }
    }
    int res=0;
    //while (!operands.empty()) { cout<<operands.top() << " "; operands.pop(); }
    //cout << endl;
    //while (!operations.empty()) { cout<<operations.top() << " "; operations.pop(); }
    while (!operations.empty())
    {
        char op = operations.top();
        operations.pop();
        int op1=operands.top();
        operands.pop();
        int op2=operands.top();
        operands.pop();
        switch(op)
        {
            case '+':
              operands.push(op1+op2);
              break;
            case '-':
                operands.push(op1-op2);
              break;
            case '*':
                operands.push(op1*op2);
                break;
        }
    }
    return operands.top();
}

int main()
{
    string input;
    while (getline(cin,input))
    {
        cout << count(input) << endl;
    }
}