FAST input and ouput

is it sufficient to write
ios_base::sync_with_stdio(false);
cin.tie(NULL);
in the starting or we have to replace every cin or cout to scanf and printf
to avoid TLE
if yes then please write whether “%d” range is upto 1 lakh or not

According to my knowledge, fast io, with cin/cout runs significantly fast. On bigger inputs, scanf/printf run a bit faster than fast io + cin and cout, but I have not yet faced a TLE based on this problem, so I can’t say much.

The range of %d is till the input range
(i.e -10^9 to 10^9).