Affect of block of code on global var is called as global polluting issue

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What is the solution of this question

If you get the logic do update

public class Q29_1 {
static void printAllSubsets(int[] A, int K) {
int N = A.length;
for (int i = 0; i < (1 << N); i++) {
int sum = 0;
for (int j = 0; j < N; j++) {
if ((i & (1 << j)) > 0)
sum += A[j];
}
if (sum == K) {
for (int j = 0; j < N; j++) {
if ((i & (1 << j)) > 0)
System.out.print(A[j] + " ");
}
System.out.println();
}
}
}
public static void main(String[] args) {
int[] A = {0, 1, 2, 3, 5, 6, 7, 11, 12, 14, 20};
int K = 7;
printAllSubsets(A, K);
}
}