# yukicoder problem solving
N, M, K = map(int, input().split())
data = [list(map(int, input().split())) for i in range(N)]
dp = [[0 for i in range(501)] for j in range(N+1)]
# dp[P][v] = P番目での買い物を終えて　それまでに使った金を v円にできるか。
dp[0][0] = 1
for i in range(N):
    for j in range(M):
        x = data[i][j]
        for k in range(501):
            if k-x >= 0 and dp[i][k-x]:
                dp[i+1][k] = 1
ans = 0
for i in range(K+1):
    if dp[N][i] == 1:
        ans = i
if ans == 0:
    print(-1)
else:
    print(K-ans)