birthday puzzle
One day Jenny celebrated her birthday. Two days later her older twin brother, Jerry, celebrated his birthday. How is this possible?
Given an integer n, write a function that returns count of trailing zeroes in n!. Examples: Input: n = 5 Output: 1 Factorial of 5 is 20 which has one trailing 0. Input: n = 20 Output: 4 Factorial of 20 is 2432902008176640000 which has 4 trailing zeroes. Input: n = 100 Output: 24
At the time she went into child labor, the mother of the twins was traveling by boat. The older twin, Jerry, was born first early on March 1st. The boat then crossed the International Date Line from east to west and therefore Jenny, the younger twin, was born on February the 28th. Therefore, the younger twin celebrates her birthday two days before her older brother come every leap year.
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