ROTATION - Quay bánh xe
Tác giả: ladpro98
Ngôn ngữ: Pascal
program rotation;
uses math;
var f:array[1..1000] of longint;
t,i,res,a,b,c:longint;
begin
readln(t);
for i:=1 to t-1 do
begin
readln(a,b,c);
f[a]:=c;
end;
for i:=1 to t-1 do
res:=(res+f[i]) mod 2;
write(res);
end.