#include <iostream>
#include <valarray>
#include <cstdint>
using namespace std;
int main() {
std::valarray<uint64_t> a((const uint64_t[1]){0x0f0f},1);
std::valarray<uint64_t> b((const uint64_t[1]){0x0101},1);
std::valarray<uint64_t> c = a&b;
cout << c[0];
// your code goes here
return 0;
}
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