Problem:
Score : 100 points

Problem Statement

A biscuit making machine produces B biscuits at the following moments: A seconds, 2A seconds, 3A seconds and each subsequent multiple of A seconds after activation.

Find the total number of biscuits produced within T + 0.5 seconds after activation.

Constraints

All values in input are integers.

1 \leq A, B, T \leq 20

Input

Input is given from Standard Input in the following format:

A B T

Output

Print the total number of biscuits produced within T + 0.5 seconds after activation.

Sample Input 1

3 5 7

Sample Output 1

10

Five biscuits will be produced three seconds after activation.

Another five biscuits will be produced six seconds after activation.

Thus, a total of ten biscuits will be produced within 7.5 seconds after activation.

Sample Input 2

3 2 9

Sample Output 2

6

Sample Input 3

20 20 19

Sample Output 3

0

Solution in Python (3.4.3) (judge verdict: Runtime Error)

# -*- coding: utf-8 -*-
import math

n = int(input())
a = [int(x) for x in input().split()]

r = {}

for j in a:
    for i in range(1, int(j**0.5)+1):
        if j % i == 0:
            if i in r.keys():
                r[i] += 1
            else:
                r[i] = 1
            if i != j // i:
                if j//i in r.keys():
                    r[j//i] += 1
                else:
                    r[j//i] = 1
m = n - 1
r_a = sorted([i[0] for i in r.items() if i[1] >= m], reverse=True)
print(r_a[0])