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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main()
  5. {
  6.     string n;
  7.     cin >> n;
  8.     bool inc = true, dec = true;
  9.     for(int i = 1; i < n.size(); i++)
  10.         if(n[i] <= n[i - 1])
  11.         {
  12.             inc = false;
  13.             break;
  14.         }
  15.     for(int i = 1; i < n.size(); i++)
  16.         if(n[i] >= n[i - 1])
  17.         {
  18.             dec = false;
  19.             break;
  20.         }
  21.     if(inc || dec)
  22.         cout << "NO";
  23.     else
  24.         cout << "YES";
  25.     return 0;
  26. }
  27.  
  28.  
Success #stdin #stdout 0s 5284KB
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stdin
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Standard input is empty
stdout
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NO
https://ideone.com/uN09Z3
language:
C++14 (gcc 8.3)
created:
3 days ago
visibility:
public

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