时间O(M*N) 空间O(1)
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
in.nextInt();
in.nextInt();
int k = in.nextInt();
while (in.hasNextInt()) {
int a = in.nextInt();
if(a==k) {
System.out.println("Yes");
return;
}
}
System.out.println("No");
}
}