P3505 - Mex Query--2018HBCPC A

内存限制：128 MB 时间限制：1.000 S

评测方式：文本比较命题人：

提交：5 解决：3

提交提交记录统计侧边提交

Give n non-negative integers, please find the least non-negative integer that doesn’t occur in the n numbers.

The first line is an integer n.

The second line are n non-negative integers a_i.

1<=n<=10^3,1<=a₁<=10^3.

Output a line with the answer.

4
4 0 1 1

3505: Mex Query--2018HBCPC A