// iostream is too mainstream
#include <cstdio>
// bitch please
#include <iostream>
#include <vector>
#include <set>
#include <map>
#include <string>
#include <queue>
#include <stack>
#include <algorithm>
#include <iomanip>
#define dibs reserve
#define OVER9000 1234567890
#define patkan 9
#define tisic 47
#define soclose 10e-7
#define ALL_THE(CAKE,LIE) for(auto LIE =CAKE.begin(); LIE != CAKE.end(); LIE++)
#define chocolate win
#define ff first
#define ss second
#define abs(x) ((x < 0)?-(x):(x))
// mylittlepony
using namespace std;
int main() {
cin.sync_with_stdio(0);
int N, ans =0;
cin >> N;
pair<int,int> p,pb =make_pair(-1,-1);
for(int i =0; i < N; i++) {
cin >> p.ff >> p.ss;
if(p.ff > pb.ff) pb =p;
ans =max(ans,pb.ss);}
cout << ans << "\n";
return 0;}
// look at my code
// my code is amazing
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