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  1. #include<bits/stdc++.h>
  2. using namespace std ;
  3. int main() {
  4.     int t ;
  5.     cin >> t ;
  6.     while( t-- ) {
  7.         int n ;
  8.         cin >> n ;
  9.         int fr[101] ;
  10.         memset( fr, 0, sizeof fr ) ;
  11.         int cnt = 0 ;
  12.         int mx = -1 ;
  13.         int mn = 101 ;
  14.         for( int i = 0 ; i < n ; i++ ) {
  15.             int a ;
  16.             cin >> a ;
  17.             mx = max( mx, a ) ;
  18.             mn = min( mn, a ) ;
  19.             if( fr[a] == 0 ) {
  20.                 cnt++ ;
  21.                 fr[a] = 1 ;
  22.             }
  23.         }
  24.         if( ( mx - mn ) == ( cnt - 1 ) )
  25.             cout << "YES" << endl ;
  26.         else
  27.             cout << "NO" << endl ;
  28.     }
  29.     return 0 ;
  30. }
  31.  
  32.  
Success #stdin #stdout 0.01s 5288KB
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https://ideone.com/9qTIrE
language:
C++14 (gcc 8.3)
created:
327 days ago
visibility:
secret

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