题解:不优

#include<bits/stdc++.h>
using namespace std;

int lcm(int x,int y)
{
    return x*y/__gcd(x,y);
}
int main()
{
    int x,y,sum=0;
    cin >> x >> y;
    for (int i=x;i<=y;i++)
    {
        for (int j=x;j<=y;j++)
        {
            if (__gcd(i,j)==x && lcm(i,j)==y)
                sum++;
        }
    }
    cout << sum;
    return 0;
}