#include <stdio.h>
#define ull unsigned long long
#define D (1LL<<32)

unsigned long long x;

int mnozalne(ull a, ull b)
{
    ull a1=a/D,a0=a%D;
    ull b1=b/D,b0=b%D;
    ull c0,c1,c2;

    c0=a0*b0;
    c1=a0*b1+b0*a1;
    c2=a1*b1;
    if (c2>0) return 0;

    c1+=c0/D;
    c0%=D;

    c2+=c1/D;
    c1%=D;
    return c2==0;
}

int main()
{
    printf("%d\n",mnozalne(143262LL,23523462LL));
    printf("%d\n",mnozalne((1LL<<32),(1LL<<32)));
    printf("%d\n",mnozalne((1LL<<32),(1LL<<32)-1));
    system("pause");
    return 0;
}