#include <bits/stdc++.h>
using namespace std;

#define dump(x) cout << (x) << '\n'
#define Int int64_t
#define fi first
#define se second
#define all(x) (x).begin(), (x).end()

Int INF = 1e18;
int inf = 1e9;
Int mod = 1e9+7;

int main() {
    Int x, n;
    cin >> x >> n;
    x--;
    bool a[3] = {};
    a[x] = true;
    for (Int i = 0; i < n; i++) {
        Int s, t;
        cin >> s >> t;
        s--, t--;
        swap(a[s], a[t]);
    }
    if (a[0]) {
        dump(1);
    } else if (a[1]) {
        dump(2);
    } else {
        dump(3);
    }
    return 0;
}