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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define gc getchar_unlocked
  4. #define fo(i,n) for(i=0;i<n;i++)
  5. #define Fo(i,k,n) for(i=k;k<n?i<n:i>n;k<n?i+=1:i-=1)
  6. #define ll long long
  7. #define si(x)	scanf("%d",&x)
  8. #define sl(x)	scanf("%lld",&x)
  9. #define ss(s)	scanf("%s",s)
  10. #define pi(x)	printf("%d\n",x)
  11. #define pl(x)	printf("%lld\n",x)
  12. #define ps(s)	printf("%s\n",s)
  13. #define pb push_back
  14. #define mp make_pair
  15. #define F first
  16. #define S second
  17. #define all(x) x.begin(), x.end()
  18. #define clr(x) memset(x, 0, sizeof(x))
  19. #define sortall(x) sort(all(x))
  20. #define tr(it, a) for(auto it = a.begin(); it != a.end(); it++)
  21. #define PI 3.1415926535897932384626
  22. typedef pair<int, int>	pii;
  23. typedef pair<ll, ll>	pl;
  24. typedef vector<int>		vi;
  25. typedef vector<ll>		vl;
  26. typedef vector<pii>		vpii;
  27. typedef vector<pl>		vpl;
  28. typedef vector<vi>		vvi;
  29. typedef vector<vl>		vvl;
  30. int mpow(int base, int exp); 
  31. void ipgraph(int m);
  32. void dfs(int u, int par);
  33. const int mod = 1000000007;
  34. const int N = 3e5, M = N;
  35. //=======================
  36.  
  37. vi g[N];
  38. int a[N][30];
  39.  
  40. int main()
  41. {
  42. 	ios_base::sync_with_stdio(false);
  43. 	cin.tie(NULL);
  44. 	int i,n,k,j,l,r;
  45.  
  46. 	cin >> l >> r;
  47.  
  48. 	Fo(i, l, r+1) a[i][0] = i;
  49. 	Fo(i, 1, 30){
  50. 		//differ in 1st i bits
  51. 		Fo(j, 1, N){
  52. 			a[j][i] = a[j][i-1];
  53. 			if( (1<<(i-1) & j) != 0 ){
  54. 				//i th bit is set
  55. 				a[j][i] |= a[j^(1<<(i-1))][i-1];
  56. 			}
  57. 		}
  58. 	}
  59. 	int ans = 0;
  60. 	Fo(i, 1, N) ans += a[i][29] == i;
  61. 	cout << ans << endl;
  62. 	return 0;
  63. } 
  64.  
  65.  
Success #stdin #stdout 0.12s 58240KB
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https://ideone.com/uJQE7N
my template :)
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
secret

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