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

dp = [0]*(K+1)
dp[0] = 1

for i in range(n):
    dpn = [0]*(K+1)
    for j in range(K+1):
        for k in range(m):
            val = j+a[i][k]
            #print(val)
            if val <= K:
                dpn[val] += dp[j]
                #print(val,dp[j],dpn)
    dp = dpn[:]

ans = -1

for i in range(1,K+1):
    if dp[i] >= 1:
        ans = K-i
print(ans)