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- #include <bits/stdc++.h>
- using namespace std;
- #define fixed(n) fixed << setprecision(n)
- #define ceil(n, m) (((n) + (m) - 1) / (m))
- #define add_mod(a, b, m) (((a % m) + (b % m)) % m)
- #define sub_mod(a, b, m) (((a % m) - (b % m) + m) % m)
- #define mul_mod(a, b, m) (((a % m) * (b % m)) % m)
- #define all(vec) vec.begin(), vec.end()
- #define rall(vec) vec.rbegin(), vec.rend()
- #define sz(x) int(x.size())
- #define debug(x) cout << #x << ": " << (x) << "\n";
- #define fi first
- #define se second
- #define ll long long
- #define ull unsigned long long
- #define EPS 1e-9
- constexpr int INF = 1 << 30, Mod = 1e9 + 7;
- constexpr ll LINF = 1LL << 62;
- #define PI acos(-1)
- template < typename T = int > using Pair = pair < T, T >;
- vector < string > RET = {"NO", "YES"};
- template < typename T = int > istream& operator >> (istream &in, vector < T > &v) {
- for (auto &x : v) in >> x;
- return in;
- }
- template < typename T = int > ostream& operator << (ostream &out, const vector < T > &v) {
- for (const T &x : v) out << x << ' ';
- return out;
- }
- void Solve(){
- int n, m, k;
- cin >> n >> m >> k;
- vector < int > a(n), b(m);
- cin >> a >> b;
- sort(all(a)), sort(all(b));
- int i = 0, j = 0, ans = 0;
- while(i < n && j < m){
- if(abs(a[i] - b[j]) <= k) ans++, i++, j++;
- else if(a[i] < b[j]) i++;
- else j++;
- }
- cout << ans << "\n";
- }
- int main(){
- ios_base::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr);
- int test_cases = 1;
- // cin >> test_cases;
- for(int tc = 1; tc <= test_cases; tc++){
- // cout << "Case #" << tc << ": ";
- Solve();
- }
- return 0;
- }
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