python find first duplicate numbers
def findDuplicateNumbers(a):
mySet = set()
for el in a:
if el in mySet:
return el
mySet.add(el)
return -1python find first duplicate numbers
def findDuplicateNumbers(a):
mySet = set()
for el in a:
if el in mySet:
return el
mySet.add(el)
return -1Copyright © 2021 Codeinu
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