Repeating_numbers

arr = [1, 2, 3, 2, 4, 5, 1, 3]

'''
def repeating_numbers(inp):
    count = {}
    result = []
    
    for i in inp:
        count[i] = count.get(i,0)+1
        
    for i in count:
        if count[i] >= 2:
           result.append(i)
    return result

print(repeating_numbers(arr))
'''


def repeating_numbers(inp):
    seen = set()
    duplicates = set()

    for i in inp:
        if i in seen:
            duplicates.add(i)
        else:
            seen.add(i)

    return list(duplicates)

print(repeating_numbers(arr))