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  1. #include <algorithm>
  2. #include <iomanip>
  3. #include <iostream>
  4. #include <vector>
  5. #include <set>
  6. #include <numeric>
  7. #include <map>
  8. #include <unordered_map>
  9. using namespace std;
  10. #define all(a) a.begin(), a.end()
  11. #define ll long long
  12. #define fo(i,n) for (long long i = 0; i < n; i++)
  13.  
  14. int main()
  15. {
  16.     ll n,q,op,a,b,j;
  17.     cin >> n;
  18.     map<ll,ll> freq;
  19.     fo(j,n)
  20.     {
  21.         cin >> b;
  22.         freq[b]++;
  23.         if (freq[b] == 3)
  24.         {
  25.             cout << "Yes";
  26.             return 0;
  27.         }
  28.     }
  29.     cout << "No";
  30.  
  31. }
Success #stdin #stdout 0.01s 5268KB
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stdin
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5
1 4 4 4 2
stdout
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Yes
https://ideone.com/2yldMh
language:
C++14 (gcc 8.3)
created:
4 days ago
visibility:
public

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