fork download
  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. #define ms(s,n) memset(s,n,sizeof(s))
  5. #define all(a) a.begin(),a.end()
  6. #define present(t, x) (t.find(x) != t.end())
  7. #define sz(a) int((a).size())
  8. #define FOR(i, a, b) for (int i = (a); i < (b); ++i)
  9. #define FORd(i, a, b) for (int i = (a) - 1; i >= (b); --i)
  10. #define pb push_back
  11. #define pf push_front
  12. #define fi first
  13. #define se second
  14. #define mp make_pair
  15.  
  16. typedef long long ll;
  17. typedef unsigned long long ull;
  18. typedef long double ld;
  19. typedef pair<int,int> pi;
  20. typedef vector<int> vi;
  21. typedef vector<pi> vii;
  22.  
  23. const int MOD = (int) 1e9+7;
  24. const int INF = (int) 1e9+1;
  25. inline ll gcd(ll a,ll b){ll r;while(b){r=a%b;a=b;b=r;}return a;}
  26. inline ll lcm(ll a,ll b){return a/gcd(a,b)*b;}
  27.  
  28.  
  29. void FileIO(){
  30. freopen("input.txt","r", stdin);
  31. freopen("output.txt","w",stdout);
  32. }
  33.  
  34. bool check(int a[],int n){
  35. sort(a,a+n);
  36. int cnt_odd=0,cnt_even=0;
  37. for(int i=0;i<n;i++){
  38. if(a[i]%2==0){
  39. ++cnt_even;
  40. }
  41. else ++cnt_odd;
  42. }
  43. if(cnt_odd%2 != cnt_even%2)
  44. return false;
  45. if(cnt_odd%2==0)
  46. return true;
  47. for(int i=0;i<n;i++){
  48. for(int j=i+1;j<n;j++){
  49. if(a[i]%2!=a[j]%2 && abs(a[i]-a[j])==1)
  50. return true;
  51. }
  52. }
  53. return false;
  54. }
  55. int main(){
  56. //FileIO();
  57. ios::sync_with_stdio(false);
  58. cin.tie(nullptr);
  59. int t;cin>>t;
  60. while(t--){
  61. int n;cin>>n;
  62. int a[n];
  63. FOR(i,0,n) cin>>a[i];
  64. if(check(a,n)) cout<<"YES\n";
  65. else cout<<"NO\n";
  66. }
  67. }
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