# Toy Cars

## 题意翻译

### 题目 有n辆玩具车。两两对撞。碰撞的结果可能是下列之一：没有任何车翻车，有一辆车翻车，或是两辆车翻车。碰撞结果由一个n×n矩阵AAA确定：在第i行和第j列的交叉点上有一个数字，描述了第i辆车和第j辆车碰撞的结果： -1：如果这对车没有碰撞。 -1只出现在矩阵的对角线上。 0：碰撞过程中没有任何一辆车翻车。 1：只有第i辆车在碰撞中翻车。 2：只有J车在碰撞中翻车。 3：两辆车在碰撞过程中翻车。 苏西想知道有多少辆的没有翻的车。你能应付这项任务吗？ ### 输入 第一行是一个整数n，接下来是一个n*n的矩阵 ### 输出 一个整数，所有没有翻的车的数量 接下来一行，表示没有翻的车的编号，两数之间用空格隔开 ### 数据范围 0

## 题目描述

Little Susie, thanks to her older brother, likes to play with cars. Today she decided to set up a tournament between them. The process of a tournament is described in the next paragraph. There are \$ n \$ toy cars. Each pair collides. The result of a collision can be one of the following: no car turned over, one car turned over, both cars turned over. A car is good if it turned over in no collision. The results of the collisions are determined by an \$ n×n \$ matrix \$ А \$ : there is a number on the intersection of the \$ і \$ -th row and \$ j \$ -th column that describes the result of the collision of the \$ і \$ -th and the \$ j \$ -th car: - \$ -1 \$ : if this pair of cars never collided. \$ -1 \$ occurs only on the main diagonal of the matrix. - \$ 0 \$ : if no car turned over during the collision. - \$ 1 \$ : if only the \$ i \$ -th car turned over during the collision. - \$ 2 \$ : if only the \$ j \$ -th car turned over during the collision. - \$ 3 \$ : if both cars turned over during the collision. Susie wants to find all the good cars. She quickly determined which cars are good. Can you cope with the task?

## 输入输出格式

### 输入格式

The first line contains integer \$ n \$ ( \$ 1<=n<=100 \$ ) — the number of cars. Each of the next \$ n \$ lines contains \$ n \$ space-separated integers that determine matrix \$ A \$ . It is guaranteed that on the main diagonal there are \$ -1 \$ , and \$ -1 \$ doesn't appear anywhere else in the matrix. It is guaranteed that the input is correct, that is, if \$ A_{ij}=1 \$ , then \$ A_{ji}=2 \$ , if \$ A_{ij}=3 \$ , then \$ A_{ji}=3 \$ , and if \$ A_{ij}=0 \$ , then \$ A_{ji}=0 \$ .

### 输出格式

Print the number of good cars and in the next line print their space-separated indices in the increasing order.

## 输入输出样例

### 输入样例 #1

``````3
-1 0 0
0 -1 1
0 2 -1
``````

### 输出样例 #1

``````2
1 3 ``````

### 输入样例 #2

``````4
-1 3 3 3
3 -1 3 3
3 3 -1 3
3 3 3 -1
``````

### 输出样例 #2

``````0
``````