#128. less20
less20
Background
Description
Return true if the given non-negative number is 1 or 2 less than a multiple of 20. So for example 38 and 39 return true, but 40 returns false. See also: Introduction to Mod
Format
Input
Output
Samples
18
true
19
true
20
false
Limitation
1s, 1024KiB for each test case.