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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main()
  5. {
  6.     string n;
  7.     cin >> n;
  8.     if(n.size() == 1)
  9.     {
  10.         cout << "YES";
  11.         return 0;
  12.     }
  13.     bool inc = true, dec = true;
  14.     for(int i = 1; i < n.size(); i++)
  15.         if(n[i] <= n[i - 1])
  16.         {
  17.             inc = false;
  18.             break;
  19.         }
  20.     for(int i = 1; i < n.size(); i++)
  21.         if(n[i] >= n[i - 1])
  22.         {
  23.             dec = false;
  24.             break;
  25.         }
  26.     if(inc || dec)
  27.         cout << "NO";
  28.     else
  29.         cout << "YES";
  30.     return 0;
  31. }
  32.  
  33.  
Success #stdin #stdout 0s 5284KB
comments (?)
stdin 
Standard input is empty
stdout 
NO
https://ideone.com/WWDzaj
language:
C++14 (gcc 8.3)
created:
3 days ago
visibility:
public

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