#include <iostream>
#include <vector>

#include <cassert>

#define cpuid(func,eax,ebx,ecx,edx)\
    __asm__ __volatile__ ("cpuid":\
    "=a" (eax),"=b" (ebx),"=c" (ecx),"=d" (edx):\
    "a" (func));


int main()
{
    {
        int a,b,c,d;
        cpuid(1,a,b,c,d);
        int extended_model = (a & 0xF0000) >> 12;
        assert(extended_model == 4 << 4);
        int family = (a & 0x0F00)>>8;
        assert(family == 6);
        int model = (a & 0xF0)>>4;
        assert(model == 15);
        int stepping = a & 0xF;
        assert(stepping == 1);
        if (__builtin_cpu_is("broadwell")) {
            std::vector<char>((1ULL << 20));
        }
    }

    int a, b;
    std::cin >> a >> b;
    std::cout << a + b << std::endl;
}

You're right. The CPU on the judging machine is Intel Xeon E5-2680 v4 (Broadwell). We updated the site news. Thanks for catching this.