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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. #define MAX_SIZE 100
  5.  
  6.  
  7.     int stack[MAX_SIZE];
  8.     int top=-1,count=0;
  9.  
  10. void push(int x, int y)
  11.  {
  12.     if (count+2 <= MAX_SIZE )
  13.  {
  14.         stack[++top] = x;
  15. count++;
  16.         stack[++top] = y;
  17. count++;
  18.         printf("Pushed\n");
  19.     } else {
  20.         printf("Overflow\n");
  21.     }
  22. }
  23.  
  24. void pop() {
  25.     if (count< 1)
  26.  {
  27.         printf("Underflow\n");
  28.     } else {
  29.         int x = stack[top--];
  30. count--;
  31.         int y = stack[top--];
  32. count--;
  33.         if (count < MAX_SIZE -1) {
  34.             stack[++top] = y;
  35. count++;
  36.         }
  37.     }
  38. }
  39.  
  40. void top_element()
  41. {
  42.     if (top== -1) {
  43.         printf("Empty\n");
  44.     } else {
  45.         printf("%d\n", stack[top]);
  46.     }
  47. }
  48.  
  49. int main() {
  50.    stack;
  51.     top = -1;
  52.  
  53.     int n;
  54.     scanf("%d", &n);
  55.  
  56.     for (int i = 0; i < n; i++) {
  57.         int command;
  58.         scanf("%d", &command);
  59.  
  60.         if (command == 1) {
  61.             int x, y;
  62.             scanf("%d %d", &x, &y);
  63.             push( x, y);
  64.         } else if (command == 2) {
  65.             pop();
  66.         } else if (command == 3) {
  67.             top_element();
  68.         }
  69.     }
  70.  
  71.     return 0;
  72. }
Success #stdin #stdout 0s 5288KB
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https://ideone.com/SJmNL6
language:
C++ (gcc 8.3)
created:
26 days ago
visibility:
public

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