Codeforces Beta Round #32 (Div. 2, Codeforces format)

http://codeforces.com/contest/32

A

 1 #include<bits/stdc++.h>
 2 using namespace std;
 3 #define lson l,mid,rt<<1
 4 #define rson mid+1,r,rt<<1|1
 5 #define sqr(x) ((x)*(x))
 6 #define pb push_back
 7 #define maxn 1000005
 8 typedef long long ll;
 9 typedef unsigned long long ull;
10 /*#ifndef ONLINE_JUDGE
11         freopen("1.txt","r",stdin);
12 #endif */
13 
14 int n,m;
15 int a[1005];
16 
17 int main(){
18     #ifndef ONLINE_JUDGE
19       //  freopen("1.txt","r",stdin);
20     #endif
21     std::ios::sync_with_stdio(false);
22     cin>>n>>m;
23     int ans=0;
24     for(int i=1;i<=n;i++) cin>>a[i];
25     for(int i=1;i<=n;i++){
26         for(int j=1;j<=n;j++){
27             if(i!=j&&abs(a[i]-a[j])<=m){
28                 ans++;
29             }
30         }
31     }
32     cout<<ans<<endl;
33 }

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