牛客周赛Round4(java)

Java组代码

import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner scanner =new Scanner(System.in);
        int n=scanner.nextInt();
        int m=scanner.nextInt();
         StringBuilder sb=new StringBuilder();
        if (m*3>n){
            System.out.println(-1);
        }else{
            for (int i = 0; i <m; i++) {
                sb.append("you");
            }
        }
        for (int i = 0; i <n-3*m; i++) {
            sb.append("y");
        }
        System.out.println(sb.toString());
    }
}