#include <iostream>
#include <iomanip>

#include <algorithm>
#include <string>
/////////
#define REP(i, x, n) for(int i = x; i < n; i++)
#define rep(i,n) REP(i,0,n)
#define P(p) cout<<(p)<<endl;
/////////
typedef long long LL;
typedef long double LD;
/////////
using namespace::std;
/////////

int main(void){
	cin.tie(0);
	ios::sync_with_stdio(false);
	cout << fixed;//
	//cout << setprecision(7);//
	
	int N;
	cin >> N;
	int M;
	cin >> M;
	int cap[4];
	rep(i,4)cap[i]=i;

	int p,q;
	rep(i,M){
		cin >> p >> q;
		swap(cap[p],cap[q]);
	}

	rep(i,4)if(cap[i]==N)P(i);
	return 0;
}