Language: C++

clude <bits/stdc++.h>
using namespace std;
 
long long X, Y, Z, K, A[1009], B[1009], C[1009];
vector<long long>vec;
 
int main() {
	cin >> X >> Y >> Z >> K;
	for (int i = 0; i < X; i++) cin >> A[i]; sort(A, A + X, greater<long long>());
	for (int i = 0; i < Y; i++) cin >> B[i]; sort(B, B + Y, greater<long long>());
	for (int i = 0; i < Z; i++) cin >> C[i]; sort(C, C + Z, greater<long long>());
	
	for (int i = 0; i < X; i++) {
		for (int j = 0; j < Y; j++) {
			for (int k = 0; k < Z; k++) {
				if ((i + 1) * (j + 1) * (k + 1) <= K) vec.push_back(A[i] + B[j] + C[k]);
				else break;
			}
		}
	}
	sort(vec.begin(), vec.end(), greater<long long>());
	for (int i = 0; i < K; i++) cout << vec[i] << endl;
	return 0;
}

Compiler output:
a.cc:1:1: error: 'clude' does not name a type
    1 | clude <bits/stdc++.h>
      | ^~~~~
a.cc:5:1: error: 'vector' does not name a type
    5 | vector<long long>vec;
      | ^~~~~~
a.cc: In function 'int main()':
a.cc:8:9: error: 'cin' was not declared in this scope
    8 |         cin >> X >> Y >> Z >> K;
      |         ^~~
a.cc:9:65: error: 'greater' was not declared in this scope
    9 |         for (int i = 0; i < X; i++) cin >> A[i]; sort(A, A + X, greater<long long>());
      |                                                                 ^~~~~~~
a.cc:9:73: error: expected primary-expression before 'long'
    9 |         for (int i = 0; i < X; i++) cin >> A[i]; sort(A, A + X, greater<long long>());
      |                                                                         ^~~~
a.cc:9:50: error: 'sort' was not declared in this scope; did you mean 'short'?
    9 |         for (int i = 0; i < X; i++) cin >> A[i]; sort(A, A + X, greater<long long>());
      |                                                  ^~~~
      |                                                  short
a.cc:10:73: error: expected primary-expression before 'long'
   10 |         for (int i = 0; i < Y; i++) cin >> B[i]; sort(B, B + Y, greater<long long>());
      |                                                                         ^~~~
a.cc:11:73: error: expected primary-expression before 'long'
   11 |         for (int i = 0; i < Z; i++) cin >> C[i]; sort(C, C + Z, greater<long long>());
      |                                                                         ^~~~
a.cc:16:71: error: 'vec' was not declared in this scope
   16 |                                 if ((i + 1) * (j + 1) * (k + 1) <= K) vec.push_back(A[i] + B[j] + C[k]);
      |                                                                       ^~~
a.cc:21:14: error: 'vec' was not declared in this scope
   21 |         sort(vec.begin(), vec.end(), greater<long long>());
      |              ^~~
a.cc:21:46: error: expected primary-expression before 'long'
   21 |         sort(vec.begin(), vec.end(), greater<long long>());
      |                                              ^~~~
a.cc:22:37: error: 'cout' was not declared in this scope
   22 |         for (int i = 0; i < K; i++) cout << vec[i] << endl;
      |                                     ^~~~
a.cc:22:55: error: 'endl' was not declared in this scope
   22 |         for (int i = 0; i < K; i++) cout << vec[i] << endl;
      |                                                       ^~~~