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  1. #include <iostream>
  2. #include <string>
  3. using namespace std;
  4.  
  5. int main() {
  6. 	string s; 
  7. 	cin >> s; //ввод строки
  8. 	for (int i=1;i<s.length();i+=2)
  9. 	{
  10. 		swap(s[i-1],s[i]); //меняем местами соседние буквы
  11. 	}
  12. 	cout << s;
  13. 	return 0;
  14. }
Success #stdin #stdout 0s 3232KB
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https://ideone.com/UsvHm0
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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