import sys
input = lambda :sys.stdin.readline()[:-1]
ni = lambda :int(input())
na = lambda :list(map(int,input().split()))
yes = lambda :print("yes");Yes = lambda :print("Yes");YES = lambda : print("YES")
no = lambda :print("no");No = lambda :print("No");NO = lambda : print("NO")
#######################################################################
n,m,k = na()
a = [na() for i in range(n)]

ok = 0
ng = 10 ** 9 + 1

while (ng - ok) > 1:
    mid = (ok + ng) // 2
    dp = [[10 ** 18] * m for i in range(n)]
    if a[0][0] >= mid:
        dp[0][0] = 0
    else:
        dp[0][0] = 1
    
    for i in range(n):
        for j in range(m):
            if i == 0 and j == 0:
                continue
            if i:
                dp[i][j] = min(dp[i][j], dp[i - 1][j] + (a[i][j] < mid))
            if j:
                dp[i][j] = min(dp[i][j], dp[i][j - 1] + (a[i][j] < mid))
    if dp[n - 1][m - 1] <= k:
        ok = mid
    else:
        ng = mid

print(ok)