import numpy as np

N, M, K = map(int, input().split())
dp = np.zeros(K + 1, dtype=bool)
dp[K] = True

for _ in range(N):
    A = map(int, input().split())
    new_dp = np.zeros(K + 1, dtype=bool)
    for a in A:
        new_dp[:-a] |= dp[a:]
    dp = new_dp
    if not np.any(dp):
        print(-1)
        exit()

print(dp.nonzero()[0][0])