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#include <iostream> using namespace std; const int maxn=200005; typedef long long ll; int main() { int n; cin >> n; for(int y = 0; y < n; y++) { ll a, b; cin >> a >> b; ll result = 0; for(ll i = 32; i >= 0; i--) { if((a & (1LL << i)) == (b & (1LL << i))) { result |= (a & (1LL << i)); } else { break; } } cout << result << endl; } return 0; }
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