No.3692 Calculate Mu
レベル :
/ AI推定難易度 : 450
/ 実行時間制限 : 1ケース 2.000秒 / メモリ制限
: 1024 MB / 標準ジャッジ問題
タグ : / 解いたユーザー数 63
作問者 :
Unbakedbread
/ テスター :
Tamiji153
タグ : / 解いたユーザー数 63
作問者 :
問題文最終更新日: 2026-09-07 01:44:01
English (AI translation)
This statement was translated by AI (claude-opus-5-5, effort medium) and may contain errors or differ in nuance from the original. The original statement takes precedence.
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Problem Statement
You are given a positive integer $N$. Find $\mu(N)$.
What is $\mu(N)$? (click to expand)
For a positive integer $N$, the value of $\mu(N)$ is defined as follows.- If $N=1$, then $\mu(N)=1$.
- If $N$ is divisible by the square of some prime, then $\mu(N)=0$.
- If $N$ is equal to the product of $K$ distinct primes, then $\mu(N)=(-1)^K$.
Constraints
- $N$ is an integer between $1$ and $10^{12}$, inclusive.
Input
$N$
Output
Output the answer.Sample
Sample 1
Input
30
Output
-1
$30$ can be expressed as $2\times 3\times 5$, a product of $3$ distinct primes. Therefore, $\mu(30)=(-1)^3=-1$.
Sample 2
Input
54
Output
0
$54$ is divisible by $3^2=9$, the square of the prime $3$. Therefore, $\mu(54)=0$.
Sample 3
Input
1
Output
1
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