#include <vector>
#include <string>
#include <algorithm>
#include <numeric>
#include <iostream>
#include <cstdlib>
#include <cstring>
#include <utility>
#include <list>
#include <map>
#include <set>
#include <queue>
#include <iterator>
#include <cmath>
#include <iomanip>
using namespace std;

using ull = unsigned long long;
using ll = long long;

int main()
{
    int n,m;
    cin >> n >> m;

    vector<int> cup(3);
    cup.at(n-1) = 1;

    for(int i = 0; i < m; ++i)
    {
        int p,q;
        cin >> p >> q;
        swap(cup.at(p-1),cup.at(q-1));
    }

    int index = 0;

    for(int i =0; i < 3; ++i)
    {
        if(cup.at(i) == 1)
        {
            index = i+1;
            break;
        }
    }

    cout << index << endl;
}