sacgajcvs

Untitled

Feb 16th, 2020
209
Never
Not a member of Pastebin yet? Sign Up, it unlocks many cool features!
  1. #include<bits/stdc++.h>
  2. #define TIME cerr << "\nTime elapsed: " << setprecision(5) <<1000.0 * clock() / CLOCKS_PER_SEC << "ms\n";
  3. using namespace std;
  4. const int N = 100005;
  5.  
  6. bitset<N> possible, temp, there, lst;
  7.  
  8. int main(){
  9. int t=1;
  10. while(t--){
  11. int n, x; scanf("%d %d", &n, &x);
  12. int mn = INT_MAX;
  13. there.reset(); possible.reset(); lst.set();
  14. for(int i = 0; i < n; i++){
  15. int y; scanf("%d", &y);
  16. mn = min(mn, y);
  17. there[y] = 1;
  18. possible[x % y] = 1;
  19. }
  20. for(int v = N - 1; v >= 1; v--){
  21. lst.reset(v);
  22. if(!there[v]) continue;
  23. // N/64 * log(N / V) calculations
  24. temp = possible;
  25. for(int j = 0; (1<<j) * v < N; j++) temp |= temp >> ((1 << j) * v);
  26. possible |= (temp & lst);
  27. }
  28. // Using log(N!) ~ N logN - N,
  29. // It can be proved that sum_{v=1}^{N} log(N / v) ~ N logN - (N logN - N) ~ N.
  30. // So, total bitset operations ~ N.
  31. there.reset();
  32. for(int i = 0; i < N; i++) if(possible[i]) there[i % mn] = 1;
  33. printf("%d\n", (int)there.count());
  34. }
  35. TIME
  36. }
RAW Paste Data

Adblocker detected! Please consider disabling it...

We've detected AdBlock Plus or some other adblocking software preventing Pastebin.com from fully loading.

We don't have any obnoxious sound, or popup ads, we actively block these annoying types of ads!

Please add Pastebin.com to your ad blocker whitelist or disable your adblocking software.

×