n,m,K = map(int,input().split())
a = [list(map(int,input().split())) for i in range(n)]


#dp[i][j] = i番目の国まで，総額j円にすることができるか

dp = [[False]*(K+1) for i in range(n)]

for i in range(m):
    if a[0][i] <= K:
        dp[0][a[0][i]] = True

for i in range(1,n):
    for j in range(K+1):
        for k in range(m):
            if j - a[i][k] < 0:
                continue
            dp[i][j] |= dp[i-1][j-a[i][k]]
mx = 0
cnt = 0
for i in range(K+1):
    if dp[n-1][i]:
        cnt += 1
        mx = i
if cnt == 0:
    print(-1)
    exit()
#print(dp)
#print(mx)
print(K-mx)