(2)如果一个数 n 没有大于 1 的奇数因子,意味着它只有偶数因子(分解质因数),但是大于 1 的偶数质数只有 2,故除非 n 是 2 的m(m >= 1)c次幂,否则一定存在大于 1 的奇数因子; (3)n 是 2 的幂可以二进制表示为 n & (n - 1)= 0; 链接:https://codeforces.com/blog/entry/87188 【正确代码】...
Sum ofgreatest odd divisorof numbers in range[a,b][a,b]witha,b<=109a,b<=109 I found solution here :https://www.geeksforgeeks.org/sum-of-greatest-odd-divisor-of-numbers-in-given-range/ But I think the solution is not clear for the even number case. ...
Today, I get a problem. Sum ofgreatest odd divisorof numbers in range[a,b][a,b]witha,b<=109a,b<=109 I found solution here :https://www.geeksforgeeks.org/sum-of-greatest-odd-divisor-of-numbers-in-given-range/ But I think the solution is not clear for the even number case. ...
Odd Divisor http://codeforces.com/problemset/problem/1475/A (n&(n-1))==1说明这个数有因子为奇数 // // Created by w on 2021-01-28. // #include <iostream> #include <cstring> using namespace std; typedef long long ll ; int main() { int t; cin>>t; while (t--) { ll n; ...