题目描述
Problem Statement
We have a sequence of $N \times K$ integers: $X=(X_0,X_1,\cdots,X_{N \times K-1})$.
Its elements are represented by another sequence of N integers: $A=(A_0,A_1,\cdots,A_{N-1})$. For each pair $i, j (0 \leq i \leq K-1$,\ $0 \leq j \leq N-1), X_{i \times N + j}=A_j$ holds.
Snuke has an integer sequence s, which is initially empty.
For each $i=0,1,2,\cdots,N \times K-1$, in this order, he will perform the following operation:
- If s does not contain X_i: add X_i to the end of s.
- If s does contain X_i: repeatedly delete the element at the end of s until s no longer contains X_i. Note that, in this case, we do not add X_i to the end of s.
Find the elements of s after Snuke finished the operations.
Input
Input is given from Standard Input in the following format:
N K
$A_0 A_1 \cdots A_{N-1}$
Output
Print the elements of s after Snuke finished the operations, in order from beginning to end, with spaces in between.
Constraints
- $1 \leq N \leq 2 \times 10^5$
- $1 \leq K \leq 10^{12}$
- $1 \leq A_i \leq 2 \times 10^5$
- All values in input are integers.
Sample Input 1
3 2
1 2 3
Sample Output 1
2 3
In this case, X=(1,2,3,1,2,3).
We will perform the operations as follows:
- i=0: s does not contain 1, so we add 1 to the end of s, resulting in s=(1).
- i=1: s does not contain 2, so we add 2 to the end of s, resulting in s=(1,2).
- i=2: s does not contain 3, so we add 3 to the end of s, resulting in s=(1,2,3).
- i=3: s does contain 1, so we repeatedly delete the element at the end of s as long as s contains 1, which causes the following changes to s: (1,2,3)→(1,2)→(1)→().
- i=4: s does not contain 2, so we add 2 to the end of s, resulting in s=(2).
- i=5: s does not contain 3, so we add 3 to the end of s, resulting in s=(2,3).
Sample Input 2
5 10
1 2 3 2 3
Sample Output 2
3
Sample Input 3
6 1000000000000
1 1 2 2 3 3
Sample Output 3
s may be empty in the end.
Sample Input 4
11 97
3 1 4 1 5 9 2 6 5 3 5
Sample Output 4
9 2 6
输入格式
见题面 Input 部分
输出格式
见题面 Output 部分