var
a,b,c,d:real;
i,s:longint;
begin;
while not eof do begin;
readln(s);
for i:=1 to s do begin;
readln(a,b,c);
d:=b*b-4*a*c;
if d<0 then writeln(*No*);
else writeln(*Yes*);
end；
end;
end.