#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define fi first
#define se second
#define endl "\n"
#define pii pair<ll,ll>
#define pb push_back
#define vi vector<ll>
#define pque priority_queue
#define pqueg priority_queue<ll,vector<ll>,greater<ll>>
#define que queue<ll>
#define FOR(m,i,n) for(int i=(m); i<=(n); i++)
#define FORM(m,i,n) for(int i=(m); i>=(n); i--)
ll n,a,b,m;
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
// TLE or not
cin >> n >> m;
FOR(1,i,m) {
cin >> a >> b;
}
FOR(1,i,9e8) {
a++;
}
cout << a << endl;
}
