纯粹练JAVA....
import java.util.*; public class Main { public static void main(String[] args) { Scanner cin=new Scanner(System.in); int n=cin.nextInt(),v=cin.nextInt(); int count=0; StringBuilder ans= new StringBuilder(); for(int lll=0;lll<n;lll++) { int k=cin.nextInt(); boolean flag=false; for(int i=0;i<k;i++) { int temp=cin.nextInt(); if(temp<v) { flag=true; } } if(flag) { count++; ans.append((lll+1)+" "); } } System.out.println(count); System.out.println(ans.toString().trim()); } }
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