RT

#include<bits/stdc++.h>
const int N = 110;
using namespace std;
int n;
int d[N];
long long a[N];
int p,q;
int main() {
    cin >> n >> p >> q;
    for (int i = 1;i <= n;i ++) {
        cin >> d[i];
        a[i] = p + d[i];
        // cout << a[i] <<endl;
    }
    sort(a + 1,a + n + 1);
    if (a[1] > p) {
        cout << a[1] - p <<endl;
    }else {
        cout << p <<endl;
    }
}