#include <bits/stdc++.h>
using namespace std;
int n,k,i,x,y;
map <int,int> mp;
int main()
{
    freopen("energii.in","r",stdin);
    freopen("energii.out","w",stdout);
    scanf("%d\n%d\n",&n,&k);
    int K=0;
    for (i=1 ; i<=n ; ++i)
    {
        scanf("%d %d\n",&x,&y);
        if (x>=k) mp[++K]=y;
    }
    printf("%d\n",mp[1]);
    return 0;
}