Первый дубликат
def Solution(a):
arr = []
value=[]
for i in range(len(a)):
if a[i] not in hash:
hash.append(a[i])
else:
value.append(i)
if len(value) ==0:
return -1
else:
idx = min(value)
return a[idx]
# a = [1,2,3,4,4,2]
a=[1,2,3,4]
Solution(a)
vip_codes