You are given a 2-D array with dimensions N X M. Your task is to perform the min function over axis 1 and then find the max of that.

Input Format
The first line of input contains the space separated values of N and M. The next N lines contains M space separated integers.

Output Format
Compute the min along axis 1 and then print the max of that result.

Sample Input
4 2
2 5
3 7
1 3
4 0

Sample Output
3