#include<stdio.h>
#define Max_Size 3
int stack[Max_Size];
int top=-1;
int size()
{
return top+1;
}
int empty()
{
if(size()==0);
return 1;
 
return 0;
}
void push(int x)
{
if(size()==Max_Size)
{
printf("over\n");
}
else
{
stack[++top]=x;
}
}
void pop()
{
if(size()==0)
{
printf("u\n");
}
else
{
top--;
}
}
int peek()
{
if(empty())
{
printf("em\n");
return -1;
}
else
{
return stack[top];
 
}
}
 
int main()
{
push(9);
printf("%d\n",top);
pop();
printf("%d\n",size());
}

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