first_recurring_charater
12345678910111213141516
arr = [2,5,1,2,3,5,1,2,4]
arr2 = [2,1,1,2,3,5,1,2,4]
arr3 = [2,3,4,5]
def repeating_numbers(inp):
seen = set()
for i in inp:
if i in seen:
return i
seen.add(i)
return None
print(repeating_numbers(arr))
Python
INFO