import numpy

n, m = map(int, input().split())
arr = []
for i in range(n):
    arr.append(list(map(int, input().split())))
    
print(max(numpy.min(arr, axis=1)))

import numpy
n,m=map(int,input().split())
l=numpy.array([input().split() for _ in range(n)],int)
a=numpy.min(l,axis=1)
print(numpy.max(a))

import numpy 
N,M = map(int,input().split())
arr = numpy.array([input().split() for _ in range(N)], int)
arr_min = numpy.min(arr, axis = 1)
print(numpy.max(arr_min))

import numpy as np

N, M = map(int, input().split())
arr = np.array([input().split() for _ in range(N)], int)

print(np.max(np.min(arr, axis=1)))

import numpy as np
N,M = map(int,input().split())
arr = np.array([input().split() for _ in range(N)],int)
arr = np.min(arr,axis=1)
print(np.max(arr))