题解 | 被打乱的异或和
被打乱的异或和
https://www.nowcoder.com/practice/116db6858c424fb89b821125053bbc15
for _ in range(int(input())):
n = int(input())
l = input().split()
print(l[0])
被打乱的异或和
https://www.nowcoder.com/practice/116db6858c424fb89b821125053bbc15
for _ in range(int(input())):
n = int(input())
l = input().split()
print(l[0])
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