Class Solution
java.lang.Object
g2401_2500.s2482_difference_between_ones_and_zeros_in_row_and_column.Solution
public class Solution
extends java.lang.Object
2482 - Difference Between Ones and Zeros in Row and Column.
Medium
You are given a 0-indexed m x n
binary matrix grid
.
A 0-indexed m x n
difference matrix diff
is created with the following procedure:
- Let the number of ones in the
ith
row beonesRowi
. - Let the number of ones in the
jth
column beonesColj
. - Let the number of zeros in the
ith
row bezerosRowi
. - Let the number of zeros in the
jth
column bezerosColj
. diff[i][j] = onesRowi + onesColj - zerosRowi - zerosColj
Return the difference matrix diff
.
Example 1:
Input: grid = [[0,1,1],[1,0,1],[0,0,1]]
Output: [[0,0,4],[0,0,4],[-2,-2,2]]
Explanation:
- diff[0][0] =
onesRow0 + onesCol0 - zerosRow0 - zerosCol0
= 2 + 1 - 1 - 2 = 0 - diff[0][1] =
onesRow0 + onesCol1 - zerosRow0 - zerosCol1
= 2 + 1 - 1 - 2 = 0 - diff[0][2] =
onesRow0 + onesCol2 - zerosRow0 - zerosCol2
= 2 + 3 - 1 - 0 = 4 - diff[1][0] =
onesRow1 + onesCol0 - zerosRow1 - zerosCol0
= 2 + 1 - 1 - 2 = 0 - diff[1][1] =
onesRow1 + onesCol1 - zerosRow1 - zerosCol1
= 2 + 1 - 1 - 2 = 0 - diff[1][2] =
onesRow1 + onesCol2 - zerosRow1 - zerosCol2
= 2 + 3 - 1 - 0 = 4 - diff[2][0] =
onesRow2 + onesCol0 - zerosRow2 - zerosCol0
= 1 + 1 - 2 - 2 = -2 - diff[2][1] =
onesRow2 + onesCol1 - zerosRow2 - zerosCol1
= 1 + 1 - 2 - 2 = -2 - diff[2][2] =
onesRow2 + onesCol2 - zerosRow2 - zerosCol2
= 1 + 3 - 2 - 0 = 2
Example 2:
Input: grid = [[1,1,1],[1,1,1]]
Output: [[5,5,5],[5,5,5]]
Explanation:
- diff[0][0] = onesRow0 + onesCol0 - zerosRow0 - zerosCol0 = 3 + 2 - 0 - 0 = 5
- diff[0][1] = onesRow0 + onesCol1 - zerosRow0 - zerosCol1 = 3 + 2 - 0 - 0 = 5
- diff[0][2] = onesRow0 + onesCol2 - zerosRow0 - zerosCol2 = 3 + 2 - 0 - 0 = 5
- diff[1][0] = onesRow1 + onesCol0 - zerosRow1 - zerosCol0 = 3 + 2 - 0 - 0 = 5
- diff[1][1] = onesRow1 + onesCol1 - zerosRow1 - zerosCol1 = 3 + 2 - 0 - 0 = 5
- diff[1][2] = onesRow1 + onesCol2 - zerosRow1 - zerosCol2 = 3 + 2 - 0 - 0 = 5
Constraints:
m == grid.length
n == grid[i].length
1 <= m, n <= 105
1 <= m * n <= 105
grid[i][j]
is either0
or1
.
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Constructor Summary
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Method Summary
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Constructor Details
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Solution
public Solution()
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Method Details
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onesMinusZeros
public int[][] onesMinusZeros(int[][] grid)
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