Problem:
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Write a program which reads an integer $S$ [second] and converts it to $h:m:s$ where $h$, $m$, $s$ denote hours, minutes (less than 60) and seconds (less than 60) respectively.

Input

An integer $S$ is given in a line.

Output

Print $h$, $m$ and $s$ separated by ':'. You do not need to put '0' for a value, which consists of a digit.

Constraints

$0 \leq S \leq 86400$

Sample Input 1

46979

Sample Output 1

13:2:59

Solution in Ruby (judge verdict: Accepted)

num = gets.to_i
h = 0
m = 0
s = 0

while num > 0
  if num >= 3600 
    h += 1
    num -= 3600
  elsif num >= 60
    m += 1
    num -= 60
  else
    s += 1
    num -= 1
  end
end

print h
print ":"
print m
print ":"
print s
puts ""