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- #include <iostream>
- #include <string>
- using namespace std;
- void changeCase(string &s)
- {
- for (int i = 0; i < s.length(); i++)
- {
- if (s[i] >= 'a' && s[i] <= 'z')
- {
- s[i] = (s[i] - 'a' + 'A');
- }
- else if (s[i] >= 'A' && s[i] <= 'Z')
- {
- s[i] = (s[i] - 'A' + 'a');
- }
- }
- }
- int main()
- {
- string s;
- cin >> s;
- changeCase(s);
- cout << s;
- }
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