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  1. #include <iostream>
  2. #include <string>
  3.  
  4. using std::cout;
  5. using std::endl;
  6. using std::string;
  7.  
  8. struct Node {
  9.     char data;
  10.     Node* next;
  11. };
  12. Node* top = nullptr;
  13.  
  14. void push(char a) {
  15.     Node* temp = new Node;
  16.     temp->data = a;
  17.     temp->next = top;
  18.     top = temp;
  19. }
  20.  
  21. void pop() {
  22.     if (top != nullptr) {
  23.         Node* temp = top;
  24.         top = top->next;
  25.         delete temp;
  26.     }
  27. }
  28.  
  29. void Print(){
  30.     Node *temp = top;
  31.     while(temp!=nullptr){
  32.         cout<<temp->data<<endl;
  33.         temp=temp->next;
  34.     }
  35. }
  36.  
  37. class Solution {
  38. public:
  39.     bool isValid(string s) {
  40.         for (char c : s) {
  41.             if (c == '(' || c == '{' || c == '[') {
  42.                 push(c);
  43.                 Print();
  44.             } else {
  45.                 if (top == nullptr) return false;
  46.                 char topchar = top->data;
  47.                 if ((c == ')' && topchar == '(') || (c == '}' && topchar == '{') || (c == ']' && topchar == '[')) {
  48.                     Print();
  49.                     pop();
  50.  
  51.                 } else {
  52.                     return false;
  53.                 }
  54.             }
  55.         }
  56.         return top == nullptr;
  57.     }
  58. };
  59.  
  60. int main()
  61. {
  62. 	Solution s;
  63.  
  64. 	std::cout << s.isValid("{[]}");
  65.  
  66. }
Success #stdin #stdout 0.01s 5288KB
comments (?)
stdin 
{[]}
stdout 
{
[
{
[
{
{
1
https://ideone.com/qpfIhb
language:
C++ (gcc 8.3)
created:
1 year ago
visibility:
secret

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