fork download
copy 
  1. /**
  2.  *    author:  orzvanh14 ( Độc cô cầu đặc )
  3.  *    created: 18.04.2026 03:56:02
  4.  *    too lazy to update time
  5. **/
  6. // i wants to take ioi
  7. //binhtinhtutinkhongcaycunhungmotkhikhongcontutinnualatuyetvong
  8. #include <bits/stdc++.h>
  9.  
  10. using namespace std;
  11.  
  12. #define int long long
  13. #define nn "\n"
  14. #define pi pair<int, int>
  15. #define ti tuple<int, int, int>
  16. #define fi first
  17. #define se second
  18. #define lb lower_bound
  19. #define ub upper_bound
  20. #define eb emplace_back
  21. #define pb push_back
  22. #define TASK " "
  23.  
  24. #define ms(a, x) memset(a, x, sizeof(a))
  25. #define all(a) a.begin(), a.end()
  26. #define All(a, n) a + 1, a + 1 + n
  27.  
  28. #define LOG 19
  29.  
  30. const int INF = 1e18;
  31. const int N = 1e5 + 5;
  32. const int maxn = 100 + 5;
  33. const int mod = 1e9 + 7;
  34.  
  35.  
  36. struct node{
  37. 	int kc, u;
  38. 	bool operator<(const node& other) const {
  39.         return kc > other.kc;
  40.     }
  41. };
  42. int n, k;
  43. int a[N];
  44. void nhap(){
  45.     cin >> n >> k;
  46.     for(int i = 1; i <= n; i++) cin >> a[i];
  47. }
  48. void solve(){
  49.     map<int, int> cnt;
  50.     int dem = 0;
  51.     for(int i = 1; i <= n; i++){
  52.         if(cnt[a[i] - k] > 0){
  53.             dem++;
  54.         }
  55.         if(cnt[a[i] + k] > 0) dem++;
  56.         cnt[a[i]]++;
  57.     }
  58.     cout << dem << nn;
  59. }
  60. signed main(){
  61. //    freopen("wormsort.in", "r", stdin);
  62. //	freopen("wormsort.out", "w", stdout);
  63. 	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  64. 	nhap();
  65. 	solve();
  66. 	return 0;
  67. }
  68.  
Success #stdin #stdout 0s 5324KB
comments (?)
stdin
copy 
5 2
1 5 3 4 2
stdout
copy 
3
https://ideone.com/XBDRqk
language:
C++14 (gcc 8.3)
created:
14 hours ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!