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 Java8 (OpenJDK 1.8.0) (judge verdict: Runtime Error)

package abc125_b;

import java.util.ArrayList;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int n = sc.nextInt();

		ArrayList<Integer> value = new ArrayList<Integer>();
		ArrayList<Integer> cost = new ArrayList<Integer>();

		for (int i = 0; i < n; i++) {
			final int v = sc.nextInt();
			value.add(v);
		}
		for (int i = 0; i < n; i++) {
			final int c = sc.nextInt();
			cost.add(c);
		}

		int result = 0;
		for (int j = 0; j < n; j++) {
			final int result1 = value.get(j) - cost.get(j);
			if (result1 < 0) {
				continue;
			}
			result = result + result1;
		}

		System.out.println(result);

	}

}