AtCoder Beginner Contest 167
D
Teleporter
AtCoder
⌀ 754
原题
← CE →
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Problem Statement

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The Kingdom of Takahashi has $N$ towns, numbered $1$ through $N$.

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There is one teleporter in each town. The teleporter in Town $i$ $(1 \leq i \leq N)$ sends you to Town $A_i$.

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Takahashi, the king, loves the positive integer $K$. The selfish king wonders what town he will be in if he starts at Town $1$ and uses a teleporter exactly $K$ times from there.

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Help the king by writing a program that answers this question.

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Constraints

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  • $2 \leq N \leq 2 \times 10^5$
  • $1 \leq A_i \leq N$
  • $1 \leq K \leq 10^{18}$
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Input

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Input is given from Standard Input in the following format:

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N K
A_1 A_2 \dots A_N

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Output

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Print the integer representing the town the king will be in if he starts at Town $1$ and uses a teleporter exactly $K$ times from there.

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样例

Input #1
4 5
3 2 4 1
Output #1
4
If we start at Town $1$ and use the teleporter $5$ times, our travel will be as follows: $1 \to 3 \to 4 \to 1 \to 3 \to 4$.
Input #2
6 727202214173249351
6 5 2 5 3 2
Output #2
2
题目信息
题号
abc167_d
时间限制
2 s
内存限制
1024 MB

题面与样例版权归 AtCoder 及出题人所有;中文翻译由 AI 生成(CI 管线),如有出入请以原文为准。