This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx,avx2,fma,bmi,bmi2")
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
int n, A, B;
ll x[2000];
int main()
{
cin.tie(0)->sync_with_stdio(0);
cin >> n >> A >> B;
for (int i = 0; i < n; i++)
cin >> x[i];
sort(x, x + n);
ll ans = 0;
for (int i = 0; i < n; i++)
ans = ans | x[i];
cout << ans << '\n';
return 0;
}
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