3_2_5_1

using namespace std;
#include <iostream>
class Arith
{
private:
    int n;
public:
    int Count(int prev_result, char sign, int result)
    {
        switch(int(sign))
        {
        case int('+'):
            return prev_result+result;
        case int('-'):
            return prev_result-result;
        case int('*'):
            return prev_result*result;
        case int('%'):
            return prev_result%result;
        }
    }
};
int main()
{
    Arith number;
    int a, b;
    char sign;
    int count = 1;
    cin >> a >> sign >> b;
    a = number.Count(a,sign,b);
    while (1)
    {
        cin >> sign;
        if (sign == 'C')
            break;
        count++;
        cin >> b;
        a = number.Count(a,sign,b);
        if (count%3 == 0)
            cout << a << endl;
    }
    return 0;
}