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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define int              long long int
  4. #define double           long double
  5. #define print(a)         for(auto x : a) cout << x << " "; cout << endl
  6.  
  7.  
  8. const int M = 1000000007;
  9. const int N = 3e5+9;
  10. const int INF = 2e9+1;
  11. const int LINF = 2000000000000000001;
  12.  
  13. inline int power(int a, int b, int mod=M) {
  14.     int x = 1;
  15.     a %= mod;
  16.     while (b) {
  17.         if (b & 1) x = (x * a) % mod; 
  18.         a = (a * a) % mod;
  19.         b >>= 1;
  20.     }
  21.     return x;
  22. }
  23.  
  24.  
  25. //_ ***************************** START Below *******************************
  26.  
  27.  
  28.  
  29.  
  30. vector<int> a;
  31.  
  32. int consistency(int n){
  33.  
  34. 	int sum = 0;
  35. 	int xr = 0;
  36.  
  37. 	int ans = 0;
  38.  
  39. 	int s = 0, e = 0;
  40. 	while(e<n){
  41. 		sum += a[e];
  42. 		xr ^= a[e];
  43.  
  44. 		if(sum == xr){
  45. 			ans += e-s+1;
  46. 			e++;
  47. 		}
  48. 		else{
  49. 			while(s<=e && sum != xr){
  50. 				sum -= a[s];
  51. 				xr ^= a[s];
  52. 				s++;
  53. 			}
  54. 			if(sum == xr){
  55. 				ans += e-s+1;
  56. 			}
  57. 			e++;
  58. 		}
  59. 	}
  60. 	return ans;
  61.  
  62. }
  63.  
  64.  
  65.  
  66.  
  67.  
  68.  
  69.  
  70.  
  71.  
  72.  
  73.  
  74.  
  75.  
  76.  
  77.  
  78. int practice(int n){
  79.  
  80.  
  81.     return 0;
  82. }
  83.  
  84.  
  85.  
  86.  
  87.  
  88. void solve() {
  89.  
  90.     int n;
  91.     cin>> n;
  92.  
  93.     a.resize(n);
  94.     for(int i=0; i<n; i++) cin >> a[i];
  95.  
  96.     cout << consistency(n) << endl;
  97.  
  98.  
  99. }
  100.  
  101.  
  102.  
  103.  
  104.  
  105. int32_t main() {
  106.     ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  107.  
  108.     int t = 1;
  109.     cin >> t;
  110.     while (t--) {
  111.         solve();
  112.     }
  113.  
  114.     return 0;
  115. }
Success #stdin #stdout 0s 5312KB
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https://ideone.com/xfN6pU
language:
C++14 (gcc 8.3)
created:
3 days ago
visibility:
public

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