#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <map>
#include <queue>
#include <numeric>
#include <climits>
using namespace std;
using ll = long long;
const ll mod = 1000000007;
int n, m;
string s, t;
string str = "yukicoder";
int main() {
	cin.tie(0);
	ios::sync_with_stdio(false);
	cin >> n >> m;
	int pos = n;
	int num[4] = {0, 1, 2, 3 };
	while (m > 0) {
		int a, b; cin >> a >> b;
		if (pos == num[a]) pos = num[b];
		int temp = 0;
		temp = num[a];
		num[a] = num[b];
		num[b] = temp;
		m--;
	}
	cout << pos << endl;
	return 0;
}