1221是一个十位和百位一样的四位数，输入五个数，输出它含有几个符号十位和百位相同的数

样例输入

1221

3456

9876

1334

8756

样例输出

2

package com.java;
import java.util.Scanner;
public class cm2 {
    public static void main(String[] args) {
        int i, n = 0,k, j;
        Scanner in = new Scanner(System.in);
        int a[][] = new int[5][4];
        for (i = 0; i < 5; i++) {
            for (j = 0; j < 4; j++) {
                a[i][j] = in.nextInt();
            }
        }
        for ( k = 0; i < 5; k++) {
            if (a[k][0]==a[k][2]){
                n++;
            }
            System.out.println(n);
        }
    }
}