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23 changes: 23 additions & 0 deletions src/L28.java
Original file line number Diff line number Diff line change
@@ -0,0 +1,23 @@
import utils.Queue;

public class L28 extends Main {

public static int sumH(Queue<Integer> queue) {
int x = queue.remove();
if (queue.head() > x) {
queue.insert(x);
return queue.head() - x + sumH(queue);
} else {
queue.insert(x);
return 0;
}
}

public static void main(String[] args) {
Queue<Integer> queue = buildQueue(1,4,8,17,20);
System.out.println(queue);
System.out.println(sumH(queue));
System.out.println(queue);
}

}
8 changes: 8 additions & 0 deletions src/utils/HelpCommands.java
Original file line number Diff line number Diff line change
Expand Up @@ -285,6 +285,14 @@ public static Queue<Integer> buildQueue(int n, int max) {
return queue;
}

public static Queue<Integer> buildQueue(int... values) {
Queue<Integer> queue = new Queue<>();
for (int value : values) {
queue.insert(value);
}
return queue;
}

/**
* @param queue
* @return the length of the queue
Expand Down