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- #include <iostream>
- using namespace std;
- int main() {
- long long int a, b;
- int res = 0;
- cin >> a >> b;
- for(int i = 2; i < 61 ; ++i) {
- for(int j = 0; j < i - 1; ++j) {
- long long int c = (1ll << i) - (1ll << j) - 1;
- if (c <= b && a <= c) res++;
- }
- }
- cout << res;
- return 0;
- }
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