#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,c;
  cin >> n >> c;
  vector<LL> p(4);
  p[n]++;
  rep(i,0,c){
    LL a,b;
    cin >> a >> b;
    swap(p[a],p[b]);
  }
  rep(i,0,4){
    if(p[i]==1){cout<<i<<endl;}
  }
  
  
}