Search in 2D matrix

// Search a 2D Matrix II
// https://leetcode.com/problems/search-a-2d-matrix-ii
class Solution {
    public boolean searchMatrix(int[][] matrix, int target) {
        int row = 0;
        int col = matrix[0].length-1;
        
        while (row < matrix.length && col >= 0){
            if (matrix[row][col] == target) return true;
            if (matrix[row][col] < target) row++;
            else if (matrix[row][col] > target) col--;
        }
       return false;
    }
}

Search a 2D Matrix

class Solution {
    public boolean searchMatrix(int[][] matrix, int target) {
        if(matrix.length == 0) return false;
        int rows = matrix.length;
        int cols = matrix[0].length;
        
        int left = 0;
        int right = rows*cols-1;
        
        while(left <= right){
            int mid = left + (right-left)/2; // calculates the mid point of 1D array.
            int midElement = matrix[mid/cols][mid%cols]; // converting midpoint of 1D array to 2D array
            if(midElement == target) return true;
            if(midElement < target) left = mid+1;
            else right = mid-1;
        }
        return false;
    }
}

Similar codes

1 vote275 views1 answer
An enclosing instance that contains Outer.Inner is required
Java
2 votes276 views1 answer
Javafx object rectangle
Java
0 vote274 views1 answer
Convert object address to string in java
Java
0 vote291 views1 answer
Create embeds jda discord
Java
0 vote273 views1 answer
Mp3 player Java
Java
0 vote330 views1 answer
Why cant we have primitive types in generixs
Java
6 votes289 views3 answers
Junit 5 expected exception
Java
0 vote259 views1 answer
Convert date to offsetdatetime in java
Java
1 vote307 views1 answer
Duplicate class org.intellij.lang.annotations.
Java
0 vote277 views1 answer
Java program pattern program to triangle using 100 numbers
Java