#include <bits/stdc++.h>

using namespace std;

#define REP(i, n) for(int i = 0; i < n; i++)

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);

    int n, m;
    cin >> n >> m;
    vector<int> a(4);
    a[n] = 1;
    REP(i, m) {
        int p, q;
        cin >> p >> q;
        swap(a[p], a[q]);
    }

    REP(i, 4) if (a[i] == 1) cout << i << endl;
    return 0;
}