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  1. // https://c...content-available-to-author-only...s.com/group/ctwVty4ZXZ/contest/273704/problem/D
  2.  
  3. #include <bits/stdc++.h>
  4.  
  5. using namespace std;
  6.  
  7. typedef long long int ll;
  8. typedef long double ld;
  9.  
  10. char c;
  11. string s;
  12. bool flag = false, fflag = false;
  13.  
  14. int main()
  15. {
  16.     cin >> s;
  17.     // Check all letters are upper except the first one.
  18.     for (int i = 1; s[i]; i++)
  19.     {
  20.         c = s[i];
  21.         if (!isupper(c))
  22.         {
  23.             flag = true;
  24.             break;
  25.         }
  26.     }
  27.  
  28.     if (!flag)
  29.     {
  30.         transform(s.begin(), s.end(), s.begin(), ::tolower);
  31.         s[0] = toupper(s[0]);
  32.         cout << s << endl;
  33.     }
  34.     else
  35.     {
  36.         cout << s << endl;
  37.     }
  38.  
  39.     return 0;
  40. }
Success #stdin #stdout 0s 4212KB
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language:

						
C++ (gcc 8.3)

					

					

						
created:
								
						
4 years ago

					

					

						
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