#include<stdio.h>

int top = -1;

int enqueue(int arr,int num){
    arr[++top] = num;
}

int dequeue(){
    return top--;
}

int main(){
    int n,num;
    scanf("%d",&n);
    int arr[n];
    for(int i=0;i<n;i++){
        scanf("%d",&num);
        enqueue(arr,num);
    }
    printf(dequeue);
    
    return 0;
}