n=int(input())
a = list(map(int,input().split()))
a.sort()
for i in range (n-1):
  if a[i] == a[i+1]:
    print('NO')
    exit()
print('YES') n=int(input()) n int(input()) int input() input a = list(map(int,input().split())) a list(map(int,input().split())) list map(int,input().split()) map int input().split() ().split () input split a.sort() a.sort a sort for i in range (n-1):
  if a[i] == a[i+1]:
    print('NO')
    exit() i range (n-1) range n-1 n 1 if a[i] == a[i+1]:
    print('NO')
    exit() a[i] == a[i+1] a[i] a i a[i+1] a i+1 i 1 print('NO') print 'NO' exit() exit print('YES') print 'YES' a = list(map(int,input().split())) list(map(int,input().split())) a n=int(input()) int(input()) n
n=int(input())
a = list(map(int,input().split()))
a.sort()
for i in range (n-1):
  if a[i] == a[i+1]:
    print('NO')
    exit()
print('YES')