#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;
using ll = long long;
using ld = long double;

#define all(x)  x.begin(),x.end()
#define v(x) vector<x>
#define nl '\n'
#define fxd(x) fixed << setprecision(x)
template<class t> using ordered_set = tree<t, null_type, less<t>, rb_tree_tag, tree_order_statistics_node_update>;
template<class t> using ordered_multiset = tree<t, null_type, less_equal<t>, rb_tree_tag, tree_order_statistics_node_update>;


int main()
{
    ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);
    int n ;cin >> n;
    //color , values of each color
    map<ll,vector<ll>> mp;
    for (int i = 0; i < n; i++)
    {
        ll a ,c; cin >> a >> c;
        mp[c].push_back(a);
    }
    ll mx = 0;
    for(const auto& pair : mp)
    {
        mx = max(mx,*min_element(all(pair.second)));
    }
    cout << mx;
}