Matrix Search

#include <iostream>
using namespace std;

void matrixSearch(int **arr, int n , int m, int key) {
    for(int row = 0;row < n;) {
        for(int col=m-1;col>=0 and row < n;) {
            if(arr[row][col] == key) {
                cout<<1;
                return;
            } else if(arr[row][col] > key) {
                col--;
            } else {
                row++;
            }
        }
    }
    cout<<0;
    return ;
}

int main() {
    int n, m;
    cin>>n>>m;
    int **arr = new int*[n];
    for(int i=0;i<n;i++) {
        arr[i]=new int[m];
    }
    for(int i=0;i<n;i++) {
        for(int j=0;j<m;j++) {
            cin>>arr[i][j];
        }
    }
    int key;
    cin>>key;
    matrixSearch(arr, n, m, key);
}