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