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24
S2OJ/1036/1036.cpp
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24
S2OJ/1036/1036.cpp
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#include <bits/stdc++.h>
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using namespace std;
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int n;
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long long x, a[1000005], pre[1000005], suf[1000005], ans;
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int main() {
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cin >> n >> x;
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for (int i = 1; i <= n; i++) {
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cin >> a[i];
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}
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for (int i = 1; i <= n; i++) {
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pre[i] = pre[i - 1] | a[i];
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}
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for (int i = n; i >= 1; i--) {
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suf[i] = suf[i + 1] | a[i];
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}
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for (int i = 1; i <= n; i++) {
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ans = max(ans, pre[i - 1] | (a[i] * x) | suf[i + 1]);
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}
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cout << ans << endl;
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return 0;
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}
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