N, M, K = map(int, input().split())
A = [tuple(map(int, input().split())) for _ in range(N)]

dp = [[0 for k in range(K + 1)] for i in range(N + 1)]
dp[0][0] = 1

for i in range(1, N + 1):
    for j in range(M):
        for k in range(K + 1):
            if k - A[i - 1][j] >= 0:
                dp[i][k] = dp[i - 1][k - A[i - 1][j]] | dp[i][k]

for k in range(K + 1)[::-1]:
    if dp[N][k]:
        print(K - k)
        break
else:
    print(-1)