import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

from functools import reduce

N,M,K = map(int,readline().split())
As = [list(map(int,readline().split())) for _ in range(N)]

dp = 1
for A in As:
    dp = reduce(lambda x,y: x|(dp << y), A, 0)

dp = dp & ((1<<K+1) - 1)
if not dp:
    print(-1)
else:
    n = dp.bit_length() - 1
    print(K - n)