import java.util.Scanner; // 注意类名必须为 Main, 不要有任何 package xxx 信息 public class Main { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); long a, b, x; a = scanner.nextInt(); b = scanner.nextInt(); x = scanner.nextInt(); long c; long cost1 = 0; long cost2 = 0; long cost3...