pair with difference k -mine v3 hacker rank

#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<string,int> psi;
typedef vector<int> vi;
typedef vector<string> vs;
typedef vector<ll> vll;
typedef vector<vector<int>> vvi;
typedef vector<vector<string>> vvs;
typedef vector<vector<ll>> vvll;

#define FOR(i, a, b) for (auto i=a; i<=(b); i++)
#define FORd(i,b,a) for (int i =b; i >= a; i--)
#define sz(x) (int)(x).size()
#define mp make_pair
#define pb push_back
#define f first
#define s second
#define ins insert

const int MOD = 1000000007;
//type functions here



int main() {

    int tc;
    cin>>tc;
    FOR(i,1,tc)
    {
        int size,k;

        cin>>size>>k;
        vi v;
        FOR(j,1,size)
        {
            //cout<<"z";
            int temp;
            cin>>temp;
            v.pb(temp);
        }
        int left=size-2,right=size-1;
        string s="false";
        sort(v.begin(),v.end());
        while(right>left&&left>=0)
        {

            //cout<<"k";
            int diff=v[right]-v[left];
            //cout<<diff<<" ";
            if(diff<k)
            left--;
            else if(diff>k)
            right--;
            else
            {
                s="true";
                break;
            }

        }
        cout<<s<<endl;
    }
    return 0;
}