#C. 丢失的数字(Missing Number)

    Type: FileIO (miss) 1000ms 256MiB

丢失的数字(Missing Number)

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Description

You are given all numbers between 1, 2,...,n except one. Your task is to find the missing number.

Format

Input

The first input line contains an integer n.

The second line contains n - 1 numbers. Each number is distinct and between 1 and n (inclusive).

Output

Print the missing number.

Samples

5
2 3 1 5
4

Limitation

  • 2n2 * 10^5
  • Time limit: 1.00 s
  • Memory limit: 512 MB

训练题单一

Not Claimed
Status
Done
Problem
9
Open Since
2024-10-11 0:00
Deadline
2024-10-26 23:59
Extension
24 hour(s)