队列641、设计循环双端队列
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2024-03-08 18:38:58
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题目
C#代码(老马老师)
public class MyCircularDeque {
private int pfront;
private int prear;
private readonly int[] dataset;
private int length;
private int maxsize;
/** Initialize your data structure here. Set the size of the deque to be k. */
public MyCircularDeque(int k) {
dataset=new int[k];
length=0;
maxsize=k;
pfront=0;
prear=0;
}
/** Adds an item at the front of Deque. Return true if the operation is successful. */
public bool InsertFront(int value) {
if(length==maxsize)
return false;
pfront=(pfront-1+maxsize)%maxsize;
dataset[pfront]=value;
length++;
return true;
}
/** Adds an item at the rear of Deque. Return true if the operation is successful. */
public bool InsertLast(int value) {
if(length==maxsize)
return false;
dataset[prear]=value;
prear=(prear+1)%maxsize;
length++;
return true;
}
/** Deletes an item from the front of Deque. Return true if the operation is successful. */
public bool DeleteFront() {
if(length==0)
return false;
pfront=(pfront+1)%maxsize;
length--;
return true;
}
/** Deletes an item from the rear of Deque. Return true if the operation is successful. */
public bool DeleteLast() {
if(length==0)
return false;
prear=(prear-1+maxsize)%maxsize;
length--;
return true;
}
/** Get the front item from the deque. */
public int GetFront() {
if(length==0)
return -1;
return dataset[pfront];
}
/** Get the last item from the deque. */
public int GetRear() {
if(length==0)
return -1;
int index=(prear-1+maxsize)%maxsize;
return dataset[index];
}
/** Checks whether the circular deque is empty or not. */
public bool IsEmpty() {
return length==0;
}
/** Checks whether the circular deque is full or not. */
public bool IsFull() {
return length==maxsize;
}
}
/**
* Your MyCircularDeque object will be instantiated and called as such:
* MyCircularDeque obj = new MyCircularDeque(k);
* bool param_1 = obj.InsertFront(value);
* bool param_2 = obj.InsertLast(value);
* bool param_3 = obj.DeleteFront();
* bool param_4 = obj.DeleteLast();
* int param_5 = obj.GetFront();
* int param_6 = obj.GetRear();
* bool param_7 = obj.IsEmpty();
* bool param_8 = obj.IsFull();
*/
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