//A
freopen("task.in","r",stdin);
freopen("task.out","w",stdout);
ios::sync_with_stdio(false);
//B
ios::sync_with_stdio(false);
freopen("task.in","r",stdin);
freopen("task.out","w",stdout);

想问一下上述两段代码都能正常工作吗？此外cin.tie(0)对常数影响大吗？