# The least round way

## 题目描述

There is a square matrix $n×n$ , consisting of non-negative integer numbers. You should find such a way on it that - starts in the upper left cell of the matrix; - each following cell is to the right or down from the current cell; - the way ends in the bottom right cell. Moreover, if we multiply together all the numbers along the way, the result should be the least "round". In other words, it should end in the least possible number of zeros.

## 输入输出格式

### 输入格式

The first line contains an integer number $n$ ( $2<=n<=1000$ ), $n$ is the size of the matrix. Then follow $n$ lines containing the matrix elements (non-negative integer numbers not exceeding $10^{9}$ ).

### 输出格式

In the first line print the least number of trailing zeros. In the second line print the correspondent way itself.

## 输入输出样例

### 输入样例 #1

3
1 2 3
4 5 6
7 8 9


### 输出样例 #1

0
DDRR