N, M, K = map(int, input().split())
omi = []
for _ in range(N):
    p = list(map(int, input().split()))
    omi.append(p)

dp = [[0 for _ in range(K+1)] for _ in range(N+1)]
dp[0][0] = 1
for i in range(N):
    for j in range(M):
        pj = omi[i][j]
        for k in range(K):
            if dp[i][k] == 1 and k + pj <= K:
                dp[i+1][k+pj] = 1

for i in range(K):
    if dp[-1][K-i] == 1:
        print(i)
        exit()

print(-1)