Problem:
Score: 200 points

Problem Statement

The number 105 is quite special - it is odd but still it has eight divisors.
Now, your task is this: how many odd numbers with exactly eight positive divisors are there between 1 and N (inclusive)?

Constraints

N is an integer between 1 and 200 (inclusive).

Input

Input is given from Standard Input in the following format:

N

Output

Print the count.

Sample Input 1

105

Sample Output 1

1

Among the numbers between 1 and 105, the only number that is odd and has exactly eight divisors is 105.

Sample Input 2

7

Sample Output 2

0

1 has one divisor. 3, 5 and 7 are all prime and have two divisors. Thus, there is no number that satisfies the condition.

Solution in Go (1.6) (judge verdict: Accepted)

package main

import (
  "fmt"
  "sort"
)
func biL(a []int, x int) int {return sort.SearchInts(a, x)}
func biR(a []int, x int) int {return sort.Search(len(a), func(i int) bool {return a[i] > x})}

func main() {
  var n int
  fmt.Scan(&n)
  cand := []int{105, 165, 195, 135, 189}
  sort.Ints(cand)
  fmt.Println(biR(cand, n))
}