#include <bits/stdc++.h>
using namespace std;
int main()
{
    int n, r, k[10000], p[10000], mx = 0, j = 0;
    cin >> n >> r;
    for (int i = 0; i < n; i++)
        cin >> k[i] >> p[i];
    for (int i = 0; i < n; i++)
    {
        if (mx < k[i] && r >= p[i])
        {
            mx = k[i];
            j = i;
        }
    }
    cout << k[j];
    return 0;
}