math/totient.hpp

• View this file on GitHub
• Last update: 2021-09-12 23:20:08-04:00
• Include: #include "math/totient.hpp"

Depends on

• template.hpp

Verified with

• tests/math/totient.test.cpp

Code

#include "../template.hpp"
#pragma once

template <typename T> T totient(T v) {
    T res = v;
    for (T i = 2; i * i <= v; i++) {
        if (v % i == 0) {
            while (v % i == 0) v /= i;
            res /= i;
            res *= i-1;
        }
    }
    if (v > 1) {
        res /= v;
        res *= v-1;
    }
    return res;
}

Traceback (most recent call last):
  File "/opt/hostedtoolcache/Python/3.10.6/x64/lib/python3.10/site-packages/onlinejudge_verify/documentation/build.py", line 71, in _render_source_code_stat
    bundled_code = language.bundle(stat.path, basedir=basedir, options={'include_paths': [basedir]}).decode()
  File "/opt/hostedtoolcache/Python/3.10.6/x64/lib/python3.10/site-packages/onlinejudge_verify/languages/cplusplus.py", line 187, in bundle
    bundler.update(path)
  File "/opt/hostedtoolcache/Python/3.10.6/x64/lib/python3.10/site-packages/onlinejudge_verify/languages/cplusplus_bundle.py", line 312, in update
    raise BundleErrorAt(path, i + 1, "#pragma once found in a non-first line")
onlinejudge_verify.languages.cplusplus_bundle.BundleErrorAt: math/totient.hpp: line 2: #pragma once found in a non-first line

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