#9:
bool res = (A % 2 != 0 || B % 2 != 0);
#10:
bool res = (A % 2 != 0 && B % 2 == 0 || A % 2 == 0 && B % 2 != 0);
#11:
bool res = (A % 2 == B % 2);
#12:
bool res = (A >= 0 && B >= 0 && C >= 0);
#13:
bool res = (A >= 0 || B >= 0 || C >= 0);
#14:
bool res = (A >= 0 && B <0 && C < 0 || A < 0 && B >= 0 && C < 0 || A < 0 && B < 0 && C >= 0);
#15:
bool res = (A >= 0 && B >= 0 && C < 0 || A >= 0 && B < 0 && C >= 0 || A < 0 && B >= 0 && C >= 0);
#16:
bool res = (A % 2 == 0 && A % 10 != 0 && A % 100 == 0);
#17:
bool res = (A % 2 != 0 && A % 100 != 0 && A % 1000 == 0);
#18:
bool res = (A == B || A == C || B == C);
#19:
bool res = (A + B == 0 || A + C == 0 || B + C == 0);