## SetMatrixZeroes.java ( File view )

• By issaczr 2014-10-24
• View(s)：52
• Point(s)： 1
```			// Author:   Li Long, 1988lilong@163.com
// Date:     Apr 17, 2014
// Source:   http://oj.leetcode.com/problems/set-matrix-zeroes/
// Analysis: http://blog.csdn.net/lilong_dream/article/details/22744137

// Given a m x n matrix, if an element is 0, set its entire row and column to 0. Do it in place.
// Did you use extra space?
// A straight forward solution using O(mn) space is probably a bad idea.
// A simple improvement uses O(m + n) space, but still not the best solution.
// Could you devise a constant space solution?

public class SetMatrixZeroes {

public void setZeroes(int[][] matrix) {

int m = matrix.length;
int n = matrix[0].length;
boolean row = false;
boolean column = false;

for (int i = 0; i < m; ++i) {

if (matrix[i][0] == 0) {

row = true;
break;

}

}

for (int j = 0; j < n; ++j) {

if (matrix[0][j] == 0) {

column = true;
break;

}

}

for (int i = 1; i < m; ++i)
for (int j = 1; j < n; ++j) {

if (matrix[i][j] == 0) {

matrix[i][0] = 0;
matrix[0][j] = 0;

}

}

for (int i = 1; i < m; ++i) {

if (matrix[i][0] == 0) {

for (int j = 1; j < n; ++j) {

matrix[i][j] = 0;

}

}

}

for (int j = 1; j < n; ++j) {

if (matrix[0][j] == 0) {

for (int i = 1; i < m; ++i) {

matrix[i][j] = 0;

}

}

}

if (row) {

for (int i = 0; i < m; ++i) {

matrix[i][0] = 0;

}

}

if (column) {

for (int j = 0; j < n; ++j) {

matrix[0][j] = 0;

}

}

}

public static void main(String[] args) {

SetMatrixZeroes slt = new SetMatrixZeroes();
int[][] matrix = new int[][]{
{
1, 1, 1, 1
},
{
1, 0, 1, 1
},
{
1, 1, 1, 1
},
{
1, 1, 1, 0
}
};
slt.setZeroes(matrix);
for (int i = 0; i < matrix.length; ++i) {

for (int j = 0; j < matrix[0].length; ++j) {

System.out.print(matrix[i][j] + " ");

}
System.out.println();

}

}

}			```
...
Expand＞ ＜Close

Point(s): 1

0 lines left, continue to read

## File list

Tips: You can preview the content of files by clicking file names^_^
Name Size Date
01.97 kB
01.97 kB
BinaryTreePreorderTraversal.java1.91 kB2014-05-09 03:48
ClimbingStairs.java811.00 B2014-05-09 03:48
EvaluateReversePolishNotation.java1.51 kB2014-05-09 03:48
GenerateParentheses.java1.15 kB2014-05-09 03:48
ImplementStrStr.java1.00 kB2014-05-09 03:48
InsertionSortList.java1.64 kB2014-05-09 03:48
IntegerToRoman.java923.00 B2014-05-09 03:48
LengthOfLastWord.java1.11 kB2014-05-09 03:48
LongestCommonPrefix.java916.00 B2014-05-09 03:48
LongestSubstring.java1.79 kB2014-05-09 03:48
MaximumSubarray.java1.10 kB2014-05-09 03:48
MedianOfTwoSortedArrays.java1.68 kB2014-05-09 03:48
MergeSortedArray.java1.12 kB2014-05-09 03:48
MergeTwoSortedLists.java1.84 kB2014-05-09 03:48
MinimumPathSum.java1.19 kB2014-05-09 03:48
PathSum.java1.67 kB2014-05-09 03:48
PlusOne.java1.06 kB2014-05-09 03:48
Powxn.java712.00 B2014-05-09 03:48
RemoveDuplicatesFromSortedList.java1.48 kB2014-05-09 03:48
RemoveDuplicatesfromSortedArray.java1.30 kB2014-05-09 03:48
RemoveElement.java885.00 B2014-05-09 03:48
RemoveNthNodeFromEnd.java1.70 kB2014-05-09 03:48
ReverseInteger.java936.00 B2014-05-09 03:48
RotateList.java1.53 kB2014-05-09 03:48
SameTree.java1.15 kB2014-05-09 03:48
SearchForARange.java1.37 kB2014-05-09 03:48
SearchInRotatedSortedArray.java1.27 kB2014-05-09 03:48
SearchInsertPosition.java1.09 kB2014-05-09 03:48
SetMatrixZeroes.java1.95 kB2014-05-09 03:48
SingleNumber.java935.00 B2014-05-09 03:48
SortList.java1.75 kB2014-05-09 03:48
Sqrt.java907.00 B2014-05-09 03:48
StringToInteger_atoi.java1.46 kB2014-05-09 03:48
Sum3.java1.76 kB2014-05-09 03:48
TwoSum.java2.33 kB2014-05-09 03:48
UniqueBinarySearchTrees.java1.01 kB2014-05-09 03:48
UniquePaths.java976.00 B2014-05-09 03:48
UniquePathsII.java1.84 kB2014-05-09 03:48
ValidParentheses.java1.23 kB2014-05-09 03:48
ValidateBinarySearchTree.java1.44 kB2014-05-09 03:48
...
• Sent successfully!
• LeetCode-Java-master.zip
• 1 point

### SetMatrixZeroes.java (35.66 kB)

Need 1 point

Get point immediately by PayPal

More(Debit card / Credit card / PayPal Credit / Online Banking)

Submit your source codes. Get more point

Don't have an account？ Register now
Need any help?
Mail to: support@codeforge.com

### 切换到中文版？

CodeForge Chinese Version
CodeForge English Version

### ^_^"Oops ...

Sorry!This guy is mysterious, its blog hasn't been opened, try another, please!

### Warm tip!

Favorite by Ctrl+D