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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. namespace std {
  6. #ifndef LOCAL
  7. #define cerr \
  8.   if (0) cerr
  9. #endif
  10. }  // namespace std
  11.  
  12. int suff[100005];
  13. int a[100005];
  14. bool dd[1 << 20];
  15. int n;
  16.  
  17. int32_t main() {
  18.   ios_base::sync_with_stdio(0);
  19.   cin.tie(0);
  20. #ifdef LOCAL
  21. #define task "a"
  22. #else
  23. #define task ""
  24. #endif
  25.   if (fopen(task ".inp", "r")) {
  26.     freopen(task ".inp", "r", stdin);
  27.     freopen(task ".out", "w", stdout);
  28.   }
  29.   cin >> n;
  30.   for (int i = 1; i <= n; i++) cin >> a[i];
  31.   for (int i = n; i >= 1; i--) suff[i] = suff[i + 1] | a[i];
  32.   for (int i = 1; i <= n; i++) {
  33.     int curr = 0;
  34.     for (int j = i; j <= n; j++) {
  35.       curr |= a[j];
  36.       dd[curr] = 1;
  37.       if ((curr | suff[j + 1]) == curr) {
  38.         break;
  39.       }
  40.     }
  41.   }
  42.   int ans = 0;
  43.   for (int i = 0; i < 1 << 20; i++) ans += dd[i];
  44.   cout << ans;
  45.   return 0;
  46. }
Success #stdin #stdout 0s 5284KB
comments (?)
stdin 
Standard input is empty
stdout 
Standard output is empty
https://ideone.com/s1c68Y
language:
C++14 (gcc 8.3)
created:
281 days ago
visibility:
public

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