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27 lines
545 B
C++
27 lines
545 B
C++
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#include <bits/stdc++.h>
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using namespace std;
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int t;
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long long n, s;
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int main() {
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cin >> t;
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while (t--) {
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cin >> n >> s;
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if (s) {
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cout << (n + 1 >> 1) << endl;
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} else if (n & 1) {
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cout << (n >> 1) << endl;
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} else {
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for (int i = 1; i <= 30; i++) {
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if ((1ll << (i - 1)) <= n && n < (1ll << i)) {
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cout << ((n - (1ll << i - 1)) >> 1) << endl;
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break;
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}
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}
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}
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}
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return 0;
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}
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