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洛谷 P10815 【模板】快速读入
输入
n
n
n
个整数
a
i
a_i
a
i
,输出它们的和。(
∣
a
i
∣
≤
n
≤
10
8
|a_i| \le n \le 10^8
∣
a
i
∣
≤
n
≤
1
0
8
)