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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. typedef long long int ll;
  4. int main() {
  5.     ll n;
  6.     cin>>n;
  7.     ll k;cin>>k;
  8.     ll arr[n];
  9.     for(ll i=0;i<n;i++){
  10.         cin>>arr[i];
  11.     }
  12.     ll c=0 ;
  13.     sort(arr,arr+n);
  14.     for (int i=0,j=0;j<n;j++) {
  15.         ll x=arr[j]-arr[i];
  16.         while(x>k){
  17.             i++;
  18.             x=arr[j]-arr[i];
  19.         }
  20.         c+=(j-i+1);
  21.     }
  22.     cout<<(c-n);
  23.     return 0;
  24. }
Success #stdin #stdout 0.01s 5280KB
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https://ideone.com/8PPOZB
language:
C++ (gcc 8.3)
created:
4 days ago
visibility:
public

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