#include<stdio.h>
#define LIMIT 5
 int stack[LIMIT];
    int top=-1;
    int push(int d){
        if(top==LIMIT-1){
            printf("Stack overflow");
            return -1;
        }
        else{
            stack[++top]=d;.kl
            return d;
   
        }
    }
    int peek(){
        if(top==-1){
            printf("Stack is empty");
            return -1;
        }
        
        else{
         stack[top];   
          return stack[top];
    }
      }
    int main(){                      
        push(10);
        push(20);
        printf("%d\n",peek());
        push(30);
        printf("%d\n",peek());
        return 0;
    }