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

0 vote157 views1 answer
Spring core xml configuration for collection using constructor
Java Spring
0 vote161 views1 answer
Java add forward / at the end of not present
Java
4 votes135 views2 answers
With uses in python
Java
0 vote136 views1 answer
Attempt to invoke virtual method 'void androidx.appcompat.app.ActionBar.setTitle(java.lang.CharSequence)' on a null object reference
Java
0 vote181 views1 answer
Display an image java
Java
9 votes292 views2 answers
Change spring port
Java Spring
0 vote140 views1 answer
Android generate random int
Java
1 vote135 views1 answer
Convert string into time in java
Java
10 votes147 views4 answers
How to find the sum of an array in java
Java
-1 vote133 views1 answer
Byte array to file java
Java