5月22日

编程题：33
import java.util.Scanner;

public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
String input = scanner.nextLine();
String[] parts = input.split(" ");
String[] part1 = parts[0].split("/");
String[] part2 = parts[1].split("/");

    int a1 = Integer.parseInt(part1[0]);
    int b1 = Integer.parseInt(part1[1]);
    int a2 = Integer.parseInt(part2[0]);
    int b2 = Integer.parseInt(part2[1]);
    
    int numerator = a1 * b2 + a2 * b1;
    int denominator = b1 * b2;
    
    int gcd = gcd(numerator, denominator);
    numerator /= gcd;
    denominator /= gcd;
    
    if (denominator == 1) {
        System.out.println(numerator);
    } else {
        System.out.println(numerator + "/" + denominator);
    }
}

public static int gcd(int a, int b) {
    while (b != 0) {
        int temp = b;
        b = a % b;
        a = temp;
    }
    return a;
}

}