#include <bits/stdc++.h>

using namespace std;

const int MAX_N = 1e6;
int a[MAX_N];

int main() {
  freopen("muasam.inp", "r", stdin);
  freopen("muasam.out", "w", stdout);

  ios::sync_with_stdio(false);
  cin.tie(nullptr);

  int n, l, r;
  cin >> n >> l >> r;
  for (int i = 0; i < n; i++)
    cin >> a[i];
  int res = 1e9;

  sort(a, a + n);
  int L = 0, R = n - 1;
  while (L < R) {
    int sum = a[L] + a[R];
    if (sum > r)
      R--;
    else if (sum < l)
      L++;
    else {
      res = min(res, sum);
      R--;
    }
  }
  cout << res << '\n';
}