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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. #define ll long long
  5. #define nl "\n"
  6. #define sz(x) x.size()
  7.  
  8. void fastio()
  9. {
  10. 	ios_base::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr);
  11. #ifndef ONLINE_JUDGE
  12. 	freopen("input.txt", "r", stdin), freopen("output.txt", "w", stdout);
  13. #endif
  14. }
  15.  
  16. bool is_Palindrome(int arr[], int start, int end)
  17. {
  18. 	if(arr[start] != arr[end])
  19. 		return false;
  20. 	is_Palindrome(arr, start + 1, end - 1);
  21. 	return true;
  22. }
  23.  
  24. void solve()
  25. {
  26. 	int n; cin >> n;
  27. 	int arr[n];
  28. 	for(int i = 0; i < n; i++)
  29. 		cin >> arr[i];
  30. 	cout << ((is_Palindrome(arr, 0, n - 1)) ? "YES\n" : "NO\n");
  31. }
  32.  
  33. int main()
  34. {
  35. 	fastio();
  36. 	int test = 1;
  37. 	// cin >> test;
  38. 	for (int tc = 1; tc <= test; tc++)
  39. 		solve();
  40. }
Success #stdin #stdout 0.01s 5296KB
comments (?)
stdin
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5
1 3 2 3 1
stdout
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YES
https://ideone.com/v6bi5M
language:
C++14 (gcc 8.3)
created:
13 days ago
visibility:
public

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