Solved
Easy
Topics
Companies
Hint
You are given an n x n integer matrix grid. an integer matrix maxLocal of size (n — 2) x (n — 2) such that:
maxLocal[i][j] is equal to the largest value of the 3 x 3 matrix in grid centered around row i + 1 and column j + 1.
In other words, we want to find the largest value in every contiguous 3 x 3 matrix in grid.
Return the generated matrix.
Example 1:
Input: grid = [[9,9,8,1],[5,6,2,6],[8,2,6,4],[6,2,2,2]]
Output: [[9,9],[8,6]]
Explanation: The diagram above shows the original matrix and the generated matrix.
Notice that each value in the generated matrix corresponds to the largest value of a contiguous 3 x 3 matrix in grid.
Example 2:
Input: grid = [[1,1,1,1,1],[1,1,1,1,1],[1,1,2,1,1],[1,1,1,1,1],[1,1,1,1,1]]
Output: [[2,2,2],[2,2,2],[2,2,2]]
Explanation: Notice that the 2 is contained within every contiguous 3 x 3 matrix in grid.
Constraints:
n == grid.length == grid[i].length
3 <= n <= 100
1 <= grid[i][j] <= 100
class Solution {
public int[][] largestLocal(int[][] grid) {
int n=grid.length;
int[][] ans=new int[n-2][n-2];
for(int i=0;i<n-2;i++){
for(int j=0;j<n-2;j++){
ans[i][j]=printMatrix(grid, i, j);
}
}
return ans;
}
public int printMatrix(int[][] grid,int i, int j){
int max=Integer.MIN_VALUE;
for(int k=i; k<i+3; k++){
for(int l=j; l<j+3; l++){
max=Math.max(grid[k][l], max);
}
}
return max;
};
}
/**
2373. Largest Local Values in a Matrix
Solved
Easy
Topics
Companies
Hint
You are given an n x n integer matrix grid.
Generate an integer matrix maxLocal of size (n - 2) x (n - 2) such that:
maxLocal[i][j] is equal to the largest value of the 3 x 3 matrix in grid centered around row i + 1 and column j + 1.
In other words, we want to find the largest value in every contiguous 3 x 3 matrix in grid.
Return the generated matrix.
Example 1:
Input: grid = [[9,9,8,1],[5,6,2,6],[8,2,6,4],[6,2,2,2]]
Output: [[9,9],[8,6]]
Explanation: The diagram above shows the original matrix and the generated matrix.
Notice that each value in the generated matrix corresponds to the largest value of a contiguous 3 x 3 matrix in grid.
Example 2:
Input: grid = [[1,1,1,1,1],[1,1,1,1,1],[1,1,2,1,1],[1,1,1,1,1],[1,1,1,1,1]]
Output: [[2,2,2],[2,2,2],[2,2,2]]
Explanation: Notice that the 2 is contained within every contiguous 3 x 3 matrix in grid.
Constraints:
n == grid.length == grid[i].length
3 <= n <= 100
1 <= grid[i][j] <= 100
*/
