Search In Matrix

#include <iostream>
#include <algorithm>
#include <iomanip>
#include <cstdlib>
#include <cmath>
#include <string>

using namespace std;

int main()
{
     //cout<<fixed<<setprecision(x);
     int n,m,x;
     bool check=false;
     cin>>n>>m;
     int arr[n][m];
     for (int i=0;i<n;i++)
     {
         for (int j=0;j<m;j++)
         {
             cin>>arr[i][j];
         }
     }
     cin>>x;
     for (int k=n-1;k<n;k++)
     {
         for (int t=0;t<m;t++)
         {
             if (x==arr[k][t])
             {
                 check=true;
             }
         }
     }
     if (check==true)
         {
             cout<<"will not take number";
         }
    else
    {
        cout<<"will take number";
    }

     return 0;
}