import java.util.*;
public class Small{
    public static void main(String [] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        if(n<0 || m<0){
            System.out.println("Invalid input");
            System.exit(0);
        }
        int arr[][]= new int[n][m];
        for(int i=0;i<n;i++){
            for(int j=0;j<m;j++){
            arr[i][j]  = sc.nextInt();
            }
        }
        int min=arr[0][0];
        for(int i=0;i<n;i++){
            if(min>arr[i]){
                min=arr[i];
            }
        }
        System.out.println(min);
    }
}