// Enjoy your stay.

#include <bits/stdc++.h>

#define EPS 1e-9
#define INF 1070000000LL
#define MOD 1000000007LL
#define fir first
#define foreach(it,X) for(auto it=(X).begin();it!=(X).end();it++)
#define ite iterator
#define mp make_pair
#define mt make_tuple
#define rep(i,n) rep2(i,0,n)
#define rep2(i,m,n) for(int i=m;i<(n);i++)
#define pb push_back
#define sec second
#define sz(x) ((int)(x).size())

using namespace std;

typedef istringstream iss;
typedef long long ll;
typedef pair<ll,ll> pi;
typedef stringstream sst;
typedef vector<ll> vi;



int main(){
	cin.tie(0);
	ios_base::sync_with_stdio(0);

	int N,K;
	cin>>N>>K;
	int p[111];
	rep(i,N)p[i] = i;
	rep(i,K){
		int X,Y;
		cin>>X>>Y;
		X--; Y--;
		swap(p[X],p[Y]);
	}
	ll ans = 1;
	int u[111] = {};
	rep(i,N)if(u[i] == 0){
		int x = i;
		ll l = 0;
		while(u[x] == 0){
			l++;
			u[x] = 1;
			x = p[x];
		}
		ans = ans / __gcd(ans, l) * l;
	}
	cout<<ans<<endl;
}