AtCoder Beginner Contest 180

传送门

A.日常签到题 B.细节模拟题

. Each value in your print will be accepted when its absolute or relative error from the correct value is at most 10-9

这句话指的是输出的小数点至少要超过9位

C题输出给定(LL)范围内的所有约数

直接上模板

#include 
#include 
#include 

using namespace std;
typedef long long ll;
vector get_divisors(ll x)
{
    vector res;
    for (ll i = 1; i > x;
        auto res = get_divisors(x);

        for (auto x : res) cout >b;
    ull ans = 0;
    y--;
    while(a