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  1. #include <iostream>
  2.  
  3. using namespace std;
  4. #define x 100000
  5.  
  6. int input[x]{};
  7. bool check[x]{};
  8.  
  9. int main()
  10. {
  11.    unsigned int n;
  12.    cin >> n;
  13.    unsigned int count = 0;
  14.  
  15.    for (int i = 0; i < n; ++i)
  16.    {
  17.       cin >> input[i];
  18.       if (input[i] != (i + 1))
  19.       {
  20.          ++count;
  21.          check[i] = 1;
  22.       }
  23.    }
  24.  
  25.    if (count > 2)
  26.       cout << "no\n";
  27.  
  28.    else
  29.    {
  30.       cout << "yes\n";
  31.  
  32.       if (count != 0)
  33.       {
  34.          for (int i = 0, refrence = 0; i < n && refrence != 2; ++i)
  35.          {
  36.             if (check[i])
  37.             {
  38.                cout << (i + 1) << ' ';
  39.                ++refrence;
  40.             }
  41.          }
  42.       }
  43.  
  44.       else
  45.          cout << 1 << ' ' << 1;
  46.  
  47.       cout << '\n';
  48.    }
  49.    return 0;
  50. }
  51.  
  52.  
Success #stdin #stdout 0.01s 5296KB
comments (?)
stdin
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Standard input is empty
stdout
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no
https://ideone.com/U132Qe
language:
C++ (gcc 8.3)
created:
14 hours ago
visibility:
public

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