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Euler's totient function

Shoykot Rayhan answered on October 28, 2022 Popularity 9/10 Helpfulness 1/10

answer Euler's totient function

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Euler's totient function

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void phi_1_to_n(int n) {
    vector<int> phi(n + 1);
    for (int i = 0; i <= n; i++)
        phi[i] = i;

    for (int i = 2; i <= n; i++) {
        if (phi[i] == i) {
            for (int j = i; j <= n; j += i)
                phi[j] -= phi[j] / i;
        }
    }
}

Popularity 9/10 Helpfulness 1/10 Language whatever

Source: cp-algorithms.com

Tags: function n whatever

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Contributed on Feb 04 2023

Shoykot Rayhan

0 Answers Avg Quality 2/10

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euler totient function

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import math

def euler_totient(n: int) -> int:
    """returns number of ints from 1 to n-1 that are coprime with n
    """
    a = {x for x in range(1, n - 1) if math.gcd(x, n) == 1}
    return len(a)

Popularity 9/10 Helpfulness 2/10 Language python

Source: Grepper

Tags: function functio

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Contributed on Oct 28 2022

The Amateur

0 Answers Avg Quality 2/10

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Euler's totient function

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