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Sep 24th, 2017
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  1. ll solve() {
  2. if (q > r) {
  3. return LLONG_MAX;
  4. }
  5. set<ll> ans;
  6. if (l / q == r / q) {
  7. ll p = (l / q) * q;
  8. for (ll i = 1; i * i <= p; i++) {
  9. if (p % i == 0) {
  10. ans.insert(i);
  11. ans.insert(p / i);
  12. }
  13. }
  14. }
  15. for (ll i = 1; i * i <= q; i++) {
  16. if (q % i == 0) {
  17. ans.insert(i);
  18. ans.insert(q / i);
  19. }
  20. }
  21. return ans.size();
  22. }
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