#include<stdio.h>
#define MAX 100

int stack[MAX];
int top =-1;

void pop()
{
    if(top==-1)
    {
        printf("Stack underflow\n");
    }
    else
    {
        printf("%d",stack[top]);
        top--;
    }
}
void peek()
{
    if(top==-1)
    {
        printf("Stack is empty");
    }
}