#include <bits/stdc++.h>
using namespace std;
 
int main() {
	int t;
	t=1;
	// cin >> t;
	while (t--){
		int n;
	cin >> n;
	int m; cin >> m;
	int k; cin >> k;
	int A[n];
	for(int i=0;i<n;i++){
		cin >> A[i];
	}
	int B[m];
	for(int i=0;i<m;i++){
		cin >> B[i];
	}
	sort(A,A+n);
	sort(B,B+m);
	int f=0;
	int l=0;
	for(int i=0;i<n;i++){
		for(int j=f;j<m;j++){
		if(abs(A[i]-B[j])<=k){
			l++;
			f=j+1;
			i++;
		}
		}
	}
	cout << l << endl;
	}
	return 0;
}

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NCAzIDUKNjAgNDUgODAgMjUKMzAgNjAgNzU=

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30 60 75