IMPA/p10409/p10409.cpp

#include <algorithm>
#include <array>
#include <iostream>
#include <map>
#include <utility>
#include <vector>
#include <iomanip>
#include <sstream>
#include <climits>
#include <queue>
#include <list>

using namespace std;

typedef unsigned int nat;

class Die
{
public:
    Die() {}

    nat top() { return t; }

    void north()
    {
        nat temp = 7-n;
        n = t;
        t = temp;
    }

    void south()
    {
        nat temp = 7-t;
        t = n;
        n = temp;
    }

    void east()
    {
        nat temp = 7-t;
        t = w;
        w = temp;
    }

    void west()
    {
        nat temp = 7-w;
        w = t;
        t = temp;
    }

private:
    nat t = 1, n = 2, w = 3;
};

int main()
{
    nat tests;

    while(cin >> tests)
    {
        if(!tests)
            break;

        Die d;
        for(nat i = 0; i < tests; ++i)
        {
            string str;

            cin >> str;

            if(str == "north")
                d.north();
            else if(str == "east")
                d.east();
            else if(str == "south")
                d.south();
            else
                d.west();
        }

        cout << d.top() << endl;
    }

    return 0;
}