Count All Sorted Rows in a Matrix in C++

In this tutorial, we will be discussing a program to find the number of all sorted rows in a matrix.

For this we will be provided with m*n matrix. Our task is to count all the rows in the given matrix that are sorted either in ascending or descending order.

Example

 Live Demo

#include <bits/stdc++.h>
#define MAX 100
using namespace std;
//counting sorted rows
int count_srows(int mat[][MAX], int r, int c){
   int result = 0;
   for (int i=0; i<r; i++){
      int j;
      for (j=0; j<c-1; j++)
      if (mat[i][j+1] <= mat[i][j])
         break;
      if (j == c-1)
         result++;
   }
   for (int i=0; i<r; i++){
      int j;
      for (j=c-1; j>0; j--)
         if (mat[i][j-1] <= mat[i][j])
            break;
      if (c > 1 && j == 0)
         result++;
   }
   return result;
}
   int main(){
   int m = 4, n = 5;
   int mat[][MAX] = {{1, 2, 3, 4, 5}, {  4, 3, 1, 2, 6}, {8, 7, 6, 5, 4}, {5, 7, 8, 9, 10}};
   cout << count_srows(mat, m, n);
   return 0;
}

Output

3