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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3.  
  4. main(){
  5.     int n,k,cnt=0;
  6.     cin>>n>>k;
  7.     vector<int>v(n);
  8.     for(auto &it:v)cin>>it;
  9.     sort(v.begin(),v.end());
  10.     for(int i=0,j=1;j<n;j++){
  11.         int d= v[j]-v[i];
  12.         while(d>k){
  13.             i++;
  14.             d=v[j]-v[i];
  15.         }
  16.         cnt+=j-i;
  17.     }
  18.     cout<<cnt<<"\n";
  19. }
Success #stdin #stdout 0s 5320KB
comments (?)
stdin
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5 5
4 3 7 1 2
stdout
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9
https://ideone.com/53eNuK
language:
C++14 (gcc 8.3)
created:
2 days ago
visibility:
public

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