#include <bits/stdc++.h>
#include <iostream>
using namespace std;
//ios::sync_with_stdio(0);cin.tie(nullptr);
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#define rep(i,a,b) for(LL i = a;i<b; i++)
#define rrep(i,a,b) for(LL i = a;i>b; i--)
#define tobirep(i,a,b,c) for(LL i = a;i<b; i+=c)
#define tobirrep(i,a,b,c) for(LL i = a;i>b; i-=c)
#define INF ((1LL<<62)-(1LL<<31))
#define ooki 9223372036854775807
#define tii -9223372036854775808
typedef long long LL;
int main(){
  ios::sync_with_stdio(0);cin.tie(nullptr);
  LL n,m;
  cin >> n >> m;
  vector<LL> t(4);
  t[1]=1;
  t[2]=0;
  t[3]=0;
  rep(i,0,m){
    LL a,b;
    cin >> a >> b;
    swap(t[a],t[b]);
  }
  rep(i,1,4){
    if(t[i]==1){cout<<i<<endl;return 0;}
  }
}