java 代码
import java.util.Scanner;
public class Main{
public static void main(String[] args){
Scanner sc=new Scanner(System.in);
int n=5;
int count=0;
while(n-->0){
int x=sc.nextInt();
String s=x+" ";
if(s.charAt(0)==s.charAt(2)&&s.charAt(1)+1==s.charAt(3)){
count++;
}
}
System.out.println(count);
}
}