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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. class Solution {
  5. public:
  6.     string removeDuplicates(string s) {
  7.         stack<char>st;
  8.         for (auto &c : s) {
  9.             if (!st.empty() && c == st.top()) {
  10.                 st.pop();
  11.             }
  12.             else {
  13.                 st.push(c);
  14.             }
  15.         }
  16.  
  17.         ostringstream ss;
  18.         while (!st.empty()) {
  19.             ss << st.top();
  20.             st.pop();
  21.         }
  22.         string res = ss.str();
  23.         reverse(res.begin(), res.end());
  24.         return res;
  25.     }
  26. };
  27.  
  28. int main() {
  29. 	// your code goes here
  30. 	return 0;
  31. }
Success #stdin #stdout 0s 5324KB
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https://ideone.com/e1ODje
language:
C++14 (gcc 8.3)
created:
3 days ago
visibility:
public

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