------
## 最终结论
```python
def get_Odd_Occurrence(arr, n):
    count_dict = {}
    for num in arr:
        if num in count_dict:
            count_dict[num] += 1
        else:
            count_dict[num] = 1
    for key, value in count_dict.items():
        if value % 2 != 0:
            return key

# Test cases
assert get_Odd_Occurrence([1,2,3,1,2,3,1],7) == 1
assert get_Odd_Occurrence([1,2,3,2,3,1,3],7) == 3
assert get_Odd_Occurrence([2,3,5,4,5,2,4,3,5,2,4,4,2],13) == 5
```