一本通1080；余数相同问题

#include 
using namespace std;
int main()
{
    int a, b, c, r1, r2, r3;
    cin >> a >> b >> c;
    for (int x = 2; ; x++)
    {
        r1 = a % x;
        r2 = b % x;
        r3 = c % x;
        if (r1 == r2 && r1 == r3)
        {
            cout << x;
            break;
        }
    }
    return 0;
}

代码在上面