PROGRAMMING:Jin Liang and Xingqi
1. There is n in the star × M regions can be regarded as a lattice divided into n rows and m columns. In each region, there are several units of objects called "stars". The minimum unit of this object has been determined. Therefore, this number is always an integer.
2. Magic can take all the "stars" in any area of the StarCraft.
3. Every time you use the method in 2 to take away the "Star", it will produce magic, and the magic will get this part of magic. The amount of magic is equal to the number of stars in this area.
Then the initial state of the star is given, and the magic value produced at most is output.
###Input format:
The first line of input contains two integers n (1 ≤ n ≤ 100), m (1 ≤ m ≤ 100).
Next N lines, each line input m number AI (0 ≤ AI ≤ 100), representing the number of "stars" in the region.
###Output format:
At most, StarCraft generates magic.
###Input example:
Here is a set of inputs. For example:
```in
1 1
one
```
###Output example:
The corresponding output is given here. For example:
```out
one
```
answer：If there is no answer, please comment
2. Magic can take all the "stars" in any area of the StarCraft.
3. Every time you use the method in 2 to take away the "Star", it will produce magic, and the magic will get this part of magic. The amount of magic is equal to the number of stars in this area.
Then the initial state of the star is given, and the magic value produced at most is output.
###Input format:
The first line of input contains two integers n (1 ≤ n ≤ 100), m (1 ≤ m ≤ 100).
Next N lines, each line input m number AI (0 ≤ AI ≤ 100), representing the number of "stars" in the region.
###Output format:
At most, StarCraft generates magic.
###Input example:
Here is a set of inputs. For example:
```in
1 1
one
```
###Output example:
The corresponding output is given here. For example:
```out
one
```
answer：If there is no answer, please comment