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  1.  
  2. #include <bits/stdc++.h>
  3. using namespace std;
  4.  
  5. int main()
  6. {
  7.  
  8.     int n, x, i, k;
  9.     cin >> n >> k;
  10.  
  11.     set<int> s;
  12.     for (i = 0; i < n; i++)
  13.     {
  14.         cin >> x;
  15.         s.insert(x);
  16.     }
  17.  
  18.     if (s.find(k) == s.end())
  19.         cout << -1 << endl;
  20.     else
  21.         cout << "YES" << endl;
  22. }
  23.  
Success #stdin #stdout 0s 5540KB
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stdin
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Standard input is empty
stdout
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-1
https://ideone.com/gx14qC
language:
C++14 (gcc 8.3)
created:
2 years ago
visibility:
public

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