CSU 1449: A+B and C

# include <stdio.h>
typedef long long int lli;
# define sign(x) ((x)>>63)
# define lsb(x) ((x)&((lli)0x1))
# define maskit(x) (lsb(x) | ((sign(x)<<31)))
lli a, b, c;
char solve(void)
{
    if (sign(a) == sign(b))
    {
        lli x = a>b ? (b+(a-b)/2):(a+(b-a)/2);
        lli y = c/2;
        if (x<y) return ‘<‘;
        else if (x>y) return ‘>‘;
        else {
            int s = sign(a);
            if (sign(a)) {
                a = -a;
                b = -b;
                c = -c;
            }
            int ia = maskit(a);
            int ib = maskit(b);
            int ic = maskit(c);
        //    printf("%d %d %d\n", ia, ib, ic);
            if (s) {
                if (lsb(ia+ib) < ic) return ‘>‘;
                else return lsb(ia+ib)==ic ? ‘=‘:‘<‘;
            }
            else {
                if (lsb(ia+ib) < ic) return ‘<‘;
                else return lsb(ia+ib)==ic ? ‘=‘:‘>‘;
            }
        }
    } else {
        lli x = (a+b);
        if (x<c) return ‘<‘;
        else return x==c ? ‘=‘:‘>‘;
    }
}
int main()
{
    int T;
    scanf("%d", &T);
    for (int i = 0; i < T; ++i)
    {
        scanf("%I64d%I64d%I64d", &a, &b, &c);
        printf("%c\n", solve());
    }
    return 0;
}