// editor3
import java.util.*;
public class Main{
    public static void main(String[] args){
        Scanner sc=new Scanner(System.in);
        if(!sc.hasNextInt()){
            System.out.println("Invalid input");
            return;
        }
        int row=sc.nextInt();
        
        int col=sc.nextInt();
        if(row<0 ||col<0){
            System.out.println("Invalid input");
            return;
        }
        int arr[][]=new int[row][col];
        for(int i=0;i<row;i++){
            for(int j=0;j<col;j++){
                arr[i][j]=sc.nextInt();
                int min=arr[0][0];
                if(arr[i][j]<=min){
                     min=arr[i][j];
                }
            }
        }
        System.out.println(min);
       
    }
}