use strict;
use warnings;

print map {
            my ($int,$dec)=split /\./,$_*10;
            $dec = defined $dec && $dec >= 5 ? 1 : 0;
            sprintf("%.2f\n", ($int+$dec)/10);
      } (<DATA>);
__DATA__
1.24
13.25
2.90
2.99
2.92
14

# OUT
1.20
13.30
2.90
3.00
2.90
14.00