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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. int size()
  10. {
  11. return count;
  12. }
  13.  
  14. void push(int x, int y)
  15.  {
  16.     if (count+2<=MAX_SIZE )
  17.  {
  18.         stack[++top] = x;
  19. count++;
  20.         stack[++top] = y;
  21. count++;
  22.         printf("Pushed\n");
  23.     } else {
  24.         printf("Overflow\n");
  25.     }
  26. }
  27.  
  28. void pop() {
  29.     if (count< 2) {
  30.         printf("Underflow\n");
  31.     } else {
  32.         int x = stack[top--];
  33. count--;
  34.         int y = stack[top--];
  35. count--;
  36.         if (count< MAX_SIZE ) {
  37.             stack[++top] = y;
  38.         }
  39.     }
  40. }
  41.  
  42. void top_element()
  43. {
  44.     if (top== -1) {
  45.         printf("Empty\n");
  46.     } else {
  47.         printf("%d\n", stack[top]);
  48.     }
  49. }
  50.  
  51. int main() {
  52.    stack;
  53.     top = -1;
  54.  
  55.     int n;
  56.     scanf("%d", &n);
  57.  
  58.     for (int i = 0; i < n; i++) {
  59.         int command;
  60.         scanf("%d", &command);
  61.  
  62.         if (command == 1) {
  63.             int x, y;
  64.             scanf("%d %d", &x, &y);
  65.             push( x, y);
  66.         } else if (command == 2) {
  67.             pop();
  68.         } else if (command == 3) {
  69.             top_element();
  70.         }
  71.     }
  72.  
  73.     return 0;
  74. }
Success #stdin #stdout 0s 5288KB
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https://ideone.com/OWSIzX
language:
C++ (gcc 8.3)
created:
26 days ago
visibility:
public

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