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  1. #include <iostream>
  2. #include <bits/stdc++.h>
  3. #include <string>
  4. using namespace std;
  5.  
  6. int main() {
  7.  
  8. string s;
  9. cin>>s;
  10. int m=0,n=s.size()-1,k=0;
  11.  
  12. while(k<=n)
  13. {
  14.      switch(s[k])
  15.      {
  16.        case 1:
  17.             swap(s[m++], s[k++]);
  18.             break;
  19.        case 2:
  20.             k++;
  21.             break;
  22.        case 3:
  23.             swap(s[k], s[n--]);
  24.             break;
  25.  
  26.        default:
  27.             k++;
  28.      }
  29. }
  30.  
  31. for(int i=0;i<s.size();i++)
  32.      cout<<s[i];
  33. 	// your code goes here
  34. 	return 0;
  35. }
Success #stdin #stdout 0s 5448KB
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https://ideone.com/ryep9p
language:
C++ (gcc 8.3)
created:
3 years ago
visibility:
public

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