Check out example codes for "Median in a row-wise sorted Matrix". It will help you in understanding the concepts better.

Code Example 1

// C++ program to find median of a matrix 
// sorted row wise 
#include<bits/stdc++.h> 
using namespace std; 
  
const int MAX = 100; 
  
// function to find median in the matrix 
int binaryMedian(int m[][MAX], int r ,int c) 
{ 
    int min = INT_MAX, max = INT_MIN; 
    for (int i=0; i<r; i++) 
    { 
        // Finding the minimum element 
        if (m[i][0] < min) 
            min = m[i][0]; 
  
        // Finding the maximum element 
        if (m[i][c-1] > max) 
            max = m[i][c-1]; 
    } 
  
    int desired = (r * c + 1) / 2; 
    while (min < max) 
    { 
        int mid = min + (max - min) / 2; 
        int place = 0; 
  
        // Find count of elements smaller than mid 
        for (int i = 0; i < r; ++i) 
            place += upper_bound(m[i], m[i]+c, mid) - m[i]; 
        if (place < desired) 
            min = mid + 1; 
        else
            max = mid; 
    } 
    return min; 
} 
  
// driver program to check above functions 
int main() 
{ 
    int r = 3, c = 3; 
    int m[][MAX]= { {1,3,5}, {2,6,9}, {3,6,9} }; 
    cout << "Median is " << binaryMedian(m, r, c) << endl; 
    return 0; 
}

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