#include<stdio.h>
#include<stdlib.h>
#include<stdbool.h>
#include<string.h>
typedef struct{
    int *data;
    int front;
    int rear;
    int size;
    int capacity;
} Deque;
Deque* createDeque(int capacity) {
    Deque*deque=(Deque*)malloc(sizeof(Deque));
    deque->data= (int*)malloc(sizeof(int)*capacity);
    deque->front =-1;
    deque->rear =-1;
    deque->size = 0;
    deque->capacity = capacity;
    return deque;
}
bool isFull(Deque* deque){
    return deque->size == deque->capacity;
}
bool isEmpty(Deque* deque) {
    return deque->size==0;
}
bool insertFront(Deque* deque, int x){
    if(isFull(deque)) return false;
    if (isEmpty(deque)) {
        deque->front = deque->rear=0;
    } else {
        deque->front = (deque->front-1 + deque->capacity) % deque->capacity;
    }
    deque->data[deque->front] = x;
    deque->size++;
    return true;
}
bool insertlast(Deque* deque, int x){
    if (isFull(deque)) return false;
    if (isEmpty(deque)) {
        deque->front = deque->rear = 0;
    } else {
        deque->rear = (deque->rear + 1) % deque->capacity;
    }
    deque->data[deque->rear] = x;
    deque->size++;
    return true;
}
int deletefront(Deque* deque) {
    if (isEmpty(deque)) return-1;
    int result = deque->data[deque->front];
    if (deque->front == deque->rear) {
        deque->front = deque->rear =-1;
    } else {
        deque->front = (deque->front + 1) % deque->capacity;
    }
    deque->size--;
    return result;
}
int datalast(Deque* deque) {
    if (isEmpty(deque)) return-1;
    int result = deque->data[deque->rear];
    if (deque->front == deque->rear) {
        deque->front = deque->rear =-1;
    } else {
        deque->rear = (deque->rear -1 + deque->capacity) % deque->capacity;
    }
    deque->size--;
    return result;
}
int getsFront(Deque* deque) {
    if(isEmpty(deque)) return-1;
    return deque->data[deque->front];
}
int getRear(Deque* deque) {
    if(isEmpty(deque)) return-1;
    return deque->data[deque->rear];
}
int main() {
    int n;
    scanf("%d", &n);
    Deque*deque = createDeque(n);
    
    char operation[20];
    while(scanf("%s",operation)!=EOF){
        if(strcmp(operation,"insertionFront")==0){
            int x;
            scanf("%d",&x);
            if(!insertFront(deque,x)){
                printf("Deque is full\n");
            }
        } else if(strcmp(operation,"insertionlast")==0){
            int x;
            scanf("%d",&x);
            if(!insertlast(deque,x)){
                printf("Deque is full\n");
            }
            }else if(strcmp(operation,"deletefront")==0){
                int result=deleteFront(deque);
                if(result==-1){
                    printf("Deque is empty\n");
                }else{
                    printf("%d\n",result);
                }
            }else if(strcmp(operation,"deletelast")==0){
                int result = dalatelast(deque);
                if(result==-1){
                    printf("deque is empty\n");
                }else{
                    printf("%d\n",result);
                }
            }else if(strcmp(operation,"getfront")==0){
                printf("%d\n",getsFront(deque));
            }else if(strcmp(operation,"getRear")==0){
                printf("%d\n",getRear(deque));
            }else if(strcmp(operation,"isEmpty")==0){
                printf(isEmpty(deque)?"true\n":"false\n");
            }else if(strcmp(operation,"isFull")==0){
                printf(isFull(deque)?"true\n":"false\n");
            }
        }
        free(deque->data);
        free(deque);
        return 0;
    }