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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. inline int power(int a, int b) {
  6.     int x = 1;
  7.     while (b) {
  8.         if (b & 1) x *= a;
  9.         a *= a;
  10.         b >>= 1;
  11.     }
  12.     return x;
  13. }
  14.  
  15.  
  16. const int M = 1000000007;
  17. const int N = 3e5+9;
  18. const int INF = 2e9+1;
  19. const int LINF = 2000000000000000001;
  20.  
  21. //_ ***************************** START Below *******************************
  22.  
  23.  
  24.  
  25.  
  26. vector<int> a;
  27. void  consistency(int n, int k) {
  28.  
  29.     map<int,int> events;
  30.  
  31.     for(int i=0; i<n; i++){
  32.     	int s = a[i]-k;
  33.     	int e = a[i]+k;
  34.  
  35.     	events[s]++;
  36.     	events[e+1]--;
  37.     }
  38.  
  39.     int acc = 0;
  40.     int ans = 0;
  41.     for(auto& e : events){
  42.     	acc += e.second;
  43.     	ans = max(ans, acc);
  44.     }
  45.  
  46.     cout << ans << endl;
  47.  
  48. }
  49.  
  50. void solve() {
  51.  
  52. 	int n, k;
  53. 	cin >> n >> k;
  54.  
  55. 	a.resize(n);
  56. 	for(int i=0; i<n; i++) cin >> a[i];
  57.  
  58. 	consistency(n, k);
  59.  
  60. }
  61.  
  62.  
  63.  
  64.  
  65.  
  66. int32_t main() {
  67.     ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  68.  
  69.     int t = 1;
  70.     cin >> t;
  71.     while (t--) {
  72.         solve();
  73.     }
  74.  
  75.     return 0;
  76. }
Success #stdin #stdout 0.01s 5324KB
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https://ideone.com/4Rsy3O
language:
C++14 (gcc 8.3)
created:
7 hours ago
visibility:
public

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