一个小时磨第一题，以下代码能AC import java.util.*; public class Main { public static void main(String args[]) { Scanner input = new Scanner(System.in); while(input.hasNextInt()){ long A = input.nextLong(); long B = input.nextLong(); long a = input.nextLong(); long b = input.nextLong(); long start = Math.min(A, (B*a)/b); for (long i = start; i >= 1 ; i--) { if((b*i)%a == 0 && (b*i)/a <= B){ long y = (b*i)/a; System.out.println(i + " " + y); break; } } } } }