#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;
}
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